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Space/Astronomy: Most Popular Articles

These articles are the most popular over the last month.
10 Brightest Stars in the Milky Way Galaxy
Stars are massive shining spheres of hot gas, the closest of which is our Sun. Stars are primarily made of hydrogen, smaller amounts of helium, and trace amounts of other elements. Even the most abundant of the other elements present in stars (oxygen, carbon, neon, and nitrogen) are only present in very small quantities. Those stars which you see with your naked eye in the night sky all belong to the Milky Way Galaxy, the huge system of stars that contains our solar system.
The Big Bang Theory Explained
It was only recently discoverd that the Universe even had a beginning. Now, scientists are trying to solve the mysteries of the early Universe. The leading theory to explain how the Universe came into existence is known as the Big Bang theory. However, there are still many things that the Big Bang theory struggles to explain.
Did You Know There Are 7 Different Types of...
When we think of stars we usually imagine our Sun. But the simple fact is that the Universe is made up of many different types of stars. In fact looking into the heavens most stars look very different, and some aren't really stars at all. So here is a run down of the most common types of stars in the galaxy.
Discover the 10 Closest Stars to Earth
You can see thousands of stars when you look up at night. Here are the Top 10 Closest Stars to our solar system.
10 Incredible (and Strange!) Astronomy Facts
Even though man has studied the heavens for thousands of years, we still know very little about the Universe we live in. And as we continue to learn more, we are consistently amazed, and sometimes confused, by what we learn. Here is a collection of amazing, interesting, and strange facts about our Universe.
Top 10 Largest Stars in the Universe
Stars are immense balls of glowing plasma. Our Sun provides all the light and heat necessary for life to exist on Earth. And while the Sun is large in comparison to Earth, it is absolutely dwarfed by some of the stars that exist outside of our solar system. Following is a list of the 10 largest stars known in our Universe.
Why Time Travel May Actually Be Possible
There have been times when I wish that I could revisit the past. Perhaps to undo a mistake, or to visit a hero of history. Time travel is an often used plot device in many science fiction works, but is there any science behind it? Is it possible to time travel into the past?
Astronomy 101: Introduction to the Basics
Astronomy 101 - This basic Astronomy course was designed for those who have an interest in but little education in astronomy. Learn the basics of astronomy here.
Is Sex in Space Possible?
It may sound taboo, but one of the most popular questions fielded by astronauts posits the idea of sex in space. Many wonder if it is even possible. Some argue that it must have happened by now, what with all the coed crews journeying to the International Space Station. So is sex in space possible? And, more interestingly, has sex in space ever happened?
10 Things Everyone Should Know About Earth
Earth, our home planet, is the only planet whose name is not derived from Greek/Roman mythology. In Roman Mythology, the goddess of the Earth was Tellus - the fertile soil, while the Greek goddes was Gaia, terra mater - Mother Earth. The name we use today, Earth, comes from Old English and Germanic.
United States Astronomy Schools - Colleges and...
Guide to colleges and universities in the United States with astronomy degree programs. Learn where you can earn a degree in astronomy or physics with an astronomy track.
How Did Neil Armstrong Become the First Man on...
It was July 20, 1969 when Neil Armstrong spoke what must be considered the most famous words of the 20th century,
How To Become An Astronaut
Many of us dreamed of becoming astronauts when we were young. Some of us never got over that dream. When John Glenn rode the shuttle in 1998 at the age of 77, it breathed new hope into many would-be astronauts. So, how do you become an astronaut? Let's discover the path, together.
An Introduction to the Pioneers and Branches of...
Astronomy, derived from the Greek words for star law, is the scientific study of all objects beyond our world, and the process by which we seek to understand the physical laws and origins of our universe.
10 Surprising Facts You Should Know About the Sun
Our Sun has inspired mythology in almost all cultures, including ancient Egyptians, Aztecs, Native Americans, and Chinese. Our Sun is actually the closest star to Earth. The Sun is a massive shining sphere of hot gas. The connection and interaction between the Sun and the Earth drive the seasons, currents in the ocean, weather, and climate.
Everything You Need to Know About Venus, the...
Venus, the second planet from the Sun, is often referred to as Earth's Sister. While similar in size to Earth, the atmosphere is vastly different.
What Are Black Holes?
A favorite phenomenon of science fiction writers, black holes are real objects that play an important role in our Universe. There are different types of black holes, arising from different processes. But they all have one thing in common, they are incredibly dense regions of space that have gravitational fields so strong that not even light can escape their grasp.
6 Things to Know Before Buying a Telescope
So, you want to know how to buy a telescope. Being a knowledgeable consumer is key Before you go shopping, learn as much as you can about telescopes. We will try to help you get started here, with the six things you need to know about how to buy a telescope.
What Are the 10 Closest Stars to Earth?
Naturally our Sun is the closest star to Earth. But beyond that most stars seem impossibly far away. But how close are our nearest neighbors. Here we take a look at the ten closest star systems to Earth.
More Songs About Space from Pop Music
Top ten rock - pop songs with a space theme including lyrics. These rock - pop songs including lyrics are all dedicated to the space age. Page 2.
Challenger Explosion - A NASA Tragedy
When the Challenger explosion occurred, it shocked the nation, started a NASA investigation, and led to many changes in the shuttle program.
Valentina Tereshkova Biography
The biography of Valentina Tereshkova, the first woman in space. The USSR sent Tereshkova into space many years before NASA sent astronaut Sally Ride.
Top 10 Astronomy & Space Hoaxes Throughout...
What is it about hoaxes that cause so many people to perpetrate them? Is there some thrill or adrenaline rush, or could it just be a feeling of superiority? I admit to occasionally being a practical joker, myself. Are these hoaxes just larger versions of my practical jokes? The hoaxes described below are definitely fascinating reading. Thanks to the Museum of Hoaxes ebsite for gathering so many of these in one place.
Early History of Astronomy: Ancient Astronomers...
Early History of Astronomy. The study of our Universe is not new, the history of astronomy shows it to be the oldest science. People have been looking up, trying to explain the universe for as long as there have been people. Here, in lesson 1, we look at the early history of astronomy. We’ll look at ancient astronomers and their contributions to the history of astronomy.
Ptolemy Biography
Ptolemy (aka Claudius Ptolemaeus, Ptolomaeus, Klaudios Ptolemaios, Ptolemeus) lived in Alexandria, Egypt. We know very little of Ptolemy's life, including his birth and death dates. He was an astronomer, mathematician and geographer. Ptolemy created the Ptolemaic System - Earth Centered Universe.
How Many Habitable Planets are in the Milky Way...
There are a vast number of stars in the Milky Way galaxy, and recent data suggests that many of them have planets orbiting around them. But how many of these would we expect to be fit for life, and how many of these will actually contain life? The answers are not so simple.
Have Aliens Walked Among Us?
For decades man has wondered if beings have another world have walked among us. Is it possible? Or is it simply science fiction? What about the evidence out there, is any of it credible. These are questions that we will explore.
Mars Closest To Earth in 50,000 Years
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Were the Apollo Moon Landings a Hoax?
Over the last several decades the Moon landings of the late 60s and early 70s have garnered much scrutiny. Some have argued that it would have been physically and technologically impossible to land men on the Moon and return them home. Was it all a hoax? I'll discuss the claims of the conspiracy theorists and let you determine for your self if man really landed on the Moon. Did you think of an issue I didn't address? Send me an email and I will be sure to add it.
What Exactly Is a Moon?
What is a moon? It's a simple question that may, on the surface, have an obvious answer. One has to do little more than look up in the night sky on clear evenings to see an example of such an object. But when it comes to defining these magnificent objects, the answer may not be so clear.
Top 10 Quotes by Neil Armstrong, the First Man...
Neil Armstrong is unequivocally an American hero. His bravery and skill earned him the honor of the first human to ever set foot on the Moon. As a result Neil Armstrong has been looked to for insight into the human condition as well as commentary on the state of technology and space exploration. Here we look at the top ten Neil Armstrong quotes, to see how he has influenced our nation and world.
Astronomy and Space FAQs
Browse these Frequently Asked Questions About Space & Astronomy. Learn the answers to Astronomy Questions & Space Questions This feature of our Basics Series; What You Need To Know About Space provides answers to astronomy questions and space questions. Discover the answers to some frequently asked questions about space.
10 Things You Need to Know About Mars
Named for the Roman god of War, Mars probably got this name due to its red color. It is sometimes referred to as the Red Planet. The name of the month March derives from Mars.
10 Basic Facts About Uranus
Uranus is one of the most interesting objects in the night sky, and is absolutely beautiful to view through a telescope. Here we take a look at the top 10 most interesting facts about Uranus.
How is "Uranus" Pronounced?
The planet Uranus is one of the most beautiful objects in the night sky, especially as viewed through a telescope. Discussion of this object is often met with snickers and laughter because of how it is pronounced. But do people pronounce it correctly, or should it be said a different way?
Free Sky Maps - Cities Around The World
You can view free sky maps as seen from various cities around the globe. Your Guide offers this online planetarium which gives you three ways to view the sky and produce free sky maps.
Constellations Pictures Gallery
Constellations information. Discover more about each of the 88 modern constellations. Find the names, information, and pictures of the 88 constellations.
10 Things You May Not Know About Mercury
Named after the Roman god of commerce, travel and thievery, Mercury is the second smallest planet in the solar system, larger only than Pluto, the most distant planet in our solar system. If Earth were the size of a baseball, Mercury would be the size of a golf ball. Viewed from Mercury, the Sun would look almost three times as large as it does from Earth.
Sound in Space
Is there sound in space? It's a common question, and the answer is often misrepresented in film and television (though producers are getting better at dealing with this issue). Recently, the question has become even more cloudy with the release of CDs from NASA that contain tracks of the different sounds in space. How can this be?
Astronomy 101 - Final Exam
Free Basic Astronomy course. Astronomy 101 - Pass a simple 20 question quiz to receive your certificate.
Stargazing Takes You "Out There"!
Some musings about astronomy as a science and as a pastime, for people who are interested in any aspect of stargazing: from casual observing to serious scholars.
The Surprising Origin of the Phrase "Once in a...
We've all heard the phrase. Space / Astronomy.
What Happens to the Human Body in a Vacuum?
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When Can We Expect to See Halley's Comet Next?
Using Newton's new Laws of motion, the astronomer, Edmond Halley, made a prediction in 1705. He stated that a comet which had appeared in 1531, 1607 and 1682 would reappear in 1758. Although he was proven to be correct, Halley did not live to see it. However, the comet was later named in his honor. During the 20th century, Halley's Comet appeared in 1910 and 1986. During that most recent visit, five spacecraft from the USSR, Japan, and the European Community journeyed to Comet Halley.
What Is The Solar System?
Solar means dealing with the sun, Sol. Our sun is just a star, the closest one to Planet Earth. The Solar System is everything that centers around the sun. That includes 8 planets as well as some smaller objects such as asteroids, comets and meteoroids. Previously, we had considered one of those smaller objects to be a ninth planet, but last year, the International Astronomical Union decided that Pluto is a Dwarf Planet.
Basic Information about the Sun
The Sun provides energy for life to exist on Earth as well as the gravitational force to keep the planets in orbit. Here you will find basic information.
Could a Gamma-ray Burst Destroy Life on Earth?
Gamma-ray Bursts (GRBs) are the most powerful events in the Universe. Despite being far, far away in distant galaxies, their radiation is detected - in significant quantities - here on Earth. This begs the question, could a GRB destroy life on Earth, particularly if it happened nearby?
Was the Apollo 13 Space Exploration Mission...
Apollo 13 was the 3rd scheduled lunar launch, carrying Jim Lovell, Fred Haize, & Jack Swigert to the moon. An explosion occurred, endangering the Apollo 13 Lunar Landing mission & astronauts Jim Lovell, Fred Haize, & Jack Swigert, the Apollo 13 space exploration mission became a race for survival. As NASA experts & contractors struggled to come up with solutions, the Apollo 13 astronauts; Jim Lovell, Fred Haize, & Jack Swigert; struggled to survive. The successful failure of space exploration.
Top Toy Planetariums
You'll have a stellar time learning about our solar system and the stars with these home planetariums. All you need is a dark room and an imaginations (and batteries of course). Help your kids begin their journey into astronomy with some great educational toys.
Will the U.S. Really Stop Sending People to...
It's been nearly 40 years since man last set foot on the Moon. Will man return? Will we venture onto more distant worlds? Well NASA has been commissioned with a new vision, and it is one that will take man to worlds beyond our own.
Why is Getting to Mars so Difficult?
In the late 1960's the United States proved to the world that it was possible to land humans on the Moon. Now, more than forty years later, the technology that took us to our nearest neighbor is quite antiquated. So with all our new advanced technology and innovation, why have we not ventured out beyond our Moon? How difficult is it really to send humans to Mars?
Top 7 Telescopes for Kids
Everyone has to start somewhere. Star your kids off right with quality telescopes at good prices. Check here for some great reflectors and refractors. Less expensive telescopes.
Does Life Exist Elsewhere in Our Galaxy?
The search for life outside our tiny blue rock has consumed the imagination of man for decades. But now, with increasingly advanced technology we may finally be on the verge of discovering where else life may exist in our galaxy. The more we search, however, the more we realize that life may be rather precious after all.
Can You Name the Brightest Star in the Sky?
Sirius, also known as the Dog Star, is the brightest star in the sky. It is also the sixth closest star to Earth. Its name comes from the Greek word for scorching. At 8.6 light years, it is also one of the closest stars to our own sun. In 1844, F.W. Bessel used analysis of its motion to determine that it had a companion. This companion was confirmed by observations in 1862 and is now known to be a white dwarf.
Rosetta Goes into Orbit Around a Comet
A look at Comet 67P/Churyumov-Gerasimenko, being studied by the Rosetta spacecraft.
Did NASA Really Find Evidence of Life on Titan?
There have been countless media reports recently claiming, with various levels of veracity, that NASA had detected evidence of life on Titan, the largest moon of Saturn. The fact is, simply, that this claim is misleading at best. The truth is not so clear cut. So what does science really say about life on other worlds?
Learn The Sky with these Useful Programs and Apps
Looking for astronomy computer programs and apps? This article looks at a few of the many good ones available.
The Basics of Telescopes
Discover the basics of telescope astronomy with this guide. Telescopes come in three basic designs; Refractor, Reflector, and Catadioptric.
Exploring the Universe
Man has always been fascinated by the heavens. Even before man knew what was out there he has thought about walking among the stars. Science fiction has revolutionized the way that we think about space exploration. And now that science is beginning to make giant leaps forward, it may not be long before science fiction becomes a reality.
Rate This Article - Black Hole Article
Rate the Black Hole Article Give Your Opinion Add your comments to the discussion. Current Rating Back
Does the U.S. Military Have a Secret Space...
The speculation of several television series, the concept of a secret military shuttle program is intriguing for sure. But is there any truth to it?
Matter-Antimatter Power on Star Trek
Aboard the famed Starship Enterprise from the television series Star Trek the propulsion systems are energized by a matter-antimatter power plant. Is such a thing even possible? Could we ever build such a device and use it to power starships?
The Top 10 Most Massive Stars
The Milky Way Galaxy is filled with hundreds of billions of stars. And the Milky Way is only one of billions of galaxies. Some of these stars are only a fraction of the Sun's mass, while others are equivalent to hundreds of Suns. So what are the 10 most massive stars in the Universe?
Earth Pictures Gallery
Discover Earth Pictures and images in this Earth Pictures Gallery. These Earth pictures are awe inspiring and tell a story about our home planet, Earth.
What Can History Teach Us About Future Solar...
NASA is predicting that the coming solar maximum could produce very energetic solar flares and coronal mass ejecta. These events have the potential to cause significant damage to our power grid as well as our orbiting satellites. But how do we know what to expect?
NASA TV Special: Looking Up at Mars
NASA TV Special: Looking Up at Mars. Tonight on NASA TV, a group of NASA astronomers and engineers will host a live 4-hour broadcast about Earth's ongoing close encounter with Mars. The purpose of the program is to help sky watchers find Mars in the night sky, and if they happen to have a telescope, to understand what they see in the eyepiece when they point their 'scope at the red planet.
Stars Munching Planets
An article about how sun-like stars may gobble up their rocky planets.
Pythagoras of Samos Biography
In addition to his contributions in mathematics, Pythagoras was essential to the early field of astronomy. Read his biography here.
Astronomy Science Fair Projects Ideas
Astronomy Science Fair Projects Ideas. Take a look at these astronomy science fair projects ideas to see if they can help you come up with your own plan.
Top 8 Telescopes Between 1000 and 5000 Dollars
If you have spent some time observing the sky with your naked eyes and a pair of binoculars, you may be ready to move on up to telescopes. As in most things in life, you typically get what you pay for. If you are looking for better telescopes to start out with, one which might carry you from a beginner to intermediate stargazer, check out these telescopes between $1000.00 and $5000.00.
The Christmas Star
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What You Should Know About Meteoroids, or...
Meteors are bits of material falling through Earth's atmosphere. Read more to find out how much meteoric material falls each day.
Top 10 Astronomy Books for Adults
Check out these top astronomy books for adults. Find astronomy books to complete your knowledge and library. From the basics through telescopes, these astronomy books will give you the insight you need.
The Sun Quiz - Try Your Luck Out on The Simple...
Sun Quiz Try Your Hand at This Simple Quiz About The Su
The Origin of Our Solar System
There have been no shortage of theories as to how our solar system formed. But it is now believed that the solar system formed from the collapse of a giant solar nebula some 4.5 billion years ago.
It's Galaxies all the Way Out!
Hubble is a cosmic time machine that helps us look back in time and out across space to some of the earliest objects in the cosmos.
How Dr. Mae Jemison Became the First African-Am...
Dr. Mae Jemison was the first African-American female astronaut in Space. Read her brief biography.
Space Shuttle Challenger Disaster - A NASA...
The Space Shuttle Challenger disaster, a NASA tragedy. When the space shuttle Challenger exploded killing all aboard, it shocked the nation, started a NASA investigation, and led to many changes in the space shuttle program. Page 2.
Visiting the Huntsville Space Center
Whether you're 1 or 100, the Huntsville Space Center has something for you! Visit the greatest rocket and space memorabilia collection anywhere.
Stars - Quiz on Stars - Try Your Luck Out on...
Stars - Quiz on Stars Try Your Hand at This Simple Quiz About Stars Discover What You Know About Star
Visiting the Johnson Houston Space Center
The Houston Space Center, also known as the Johnson Space Center, is a place where you can experience space in all its drama and excitement.
Mars - The Red Planet
The red planet, Mars, has inspired flights of imagination over the centuries, and intense scientific interest. Whether fancied as the source of hostile invaders, the home of a dying civilization, or a rough-and-tumble mining colony of the future, Mars, the red planet, provides fertile ground for science fiction writers. Discover our neighbor, the red planet, Mars, in all its glory. Learn about the moons and missions of Mars.
Earth Pictures - Full Earth
View of the Earth as seen by the Apollo 17 crew traveling toward the Moon. This translunar coast photograph extends from the Mediterranean Sea area to the Antarctica South polar ice cap. This is the first time the Apollo trajectory made it possible to photograph the South polar ice cap. Note the heavy cloud cover in the Southern Hemisphere. Almost the entire coastline of Africa is clearly visible. . Page 12.
Who Really Invented the Telescope? (Hint: It...
So, who did invent the telescope? Learn this and other space and astronomy-related frequently asked questions here.
Red Supergiant Stars
The largest stars in the Universe are red supergiants. The creation and evolution of these behemoths is an active area of research among scientists. It is believed that high mass stars eventually evolve into supergiants once they leave the main sequence and that, eventually, they will brilliantly explode in a massive supernova.
Did the Earth Once Have Two Moons?
We are all familiar with the Moon, the billiant object that lights up the night sky on most nights. However, there are some properties of the Moon that have baffled scientists for decades. Now, some suggest that the oddities are because our Moon is actually the result of a merger between the two Moons that used to orbit our tiny world.
Proxima Centauri Information
The closest star to our our own solar system will not always be closest, but it will be a long time before that happens. Proxima Centauri is the third star in the Alpha Centauri star system Also known as Alpha Centauri C, it circles its two companions at about 930 billion miles. This orbit takes millions of years, but will eventually carry Proxima far enough that its companions,collectively known as Rigel Kentaurus, will be closer. It is a red dwarf star, much smaller and cooler than the Sun.
Solar System
A solar system consists of a star & all the objects orbiting it as well as all the material in that system. Our Solar System includes the Sun together with the eight planets & their moons as well as all other celestial bodies that orbit the sun. Besides the sun, 8 planets & their moons, our Solar System contains billions of other objects and extends far beyond the outermost planets. There are several hundred thousand asteroids revolving around the Sun. Most have orbits between Mars and Jupiter.
Supernovae (plural form of supernova) are the most violent events in the Universe. The energy emitted during an event can outshine an entire galaxy of billions of stars. The result of a massive star dying, they are fascinating to study, and brilliant to behold.
What is the Doppler Effect?
The doppler effect is a phenomenon by which a source's radiation appears to be of higher (blueshifted) or lower (redshifted) energy than it really is. This is caused by the object's motion relative to the observer, and is an important tool in astronomy as we try to understand the Universe.
Top 10 Astronomy and Space Weblogs (Blogs)
According to Sheila Ann Manuel Coggins, the About Guide to Weblogs, the definition of a Weblog or Blog
Can Women Get Pregnant in Outer Space?
If mankind is ever to conquer the cosmos it will be necessary for humans to procreate in outer space. But it turns out that this is currently easier said than done. There are significant barriers that stand in the way of women getting pregnant in space. The most immediate impact will be on any future plans to send astronauts to Mars for an extended stay.
10 Interesting Facts About the Planet Venus
Venus whose Greek equivalent was Aphrodite was the Roman goddess of love and beauty. Venus probably got its name from being the brightest object in the sky except for the Sun and the Moon. Venus has always been considered a feminine planet, with many legends and stories concerning its inhabitants. Even one modern doctor says that women are from Venus.
Solar System Tour - Visit Our Galactic...
Astronomy Solar System Tour, an Astronomy Guide to Space exploration close to home. Discover information on planets in our solar system. Find pictures of objects in our solar system. Learn more about our galactic neighborhood, our solar system.
Is There a Dark Side of the Moon?
How many time have you used that phrase, dark side of the moon? At times, some people have been of the belief that one side of the moon was always dark, hence the phrase dark side of the moon. Is ther really a dark side of the moon? Read this article to learn the truth about the dark side of the moon.
Introducing Sky in Google Earth
From the people who brought you Google Earth, there's a new product called Sky, a new feature that enables users of Google Earth to view the sky as seen from planet Earth. This virtual telescope will allow users to float through the skies via Google Earth. Sky will come as a simple click from the Google Earth interface.
How Do We Stop Asteroids from Destroying Earth?
The threat of a large asteroid or comet colliding with Earth is very real. How will we stop the destruction of Earth? Is there a plan to combat the, potentially, greatest threat to life on Earth?
Astronomy 101 - Astronomy History - Seeing Is...
Astronomy 101 - Astronomy History - Seeing Is Believing - Lesson 2: History - A Renaissance in Science
What are Rotation and Revolution?
Rotation and revolution are vital to the study of astronomy, as virtually all heavenly bodies undergo some rotational dynamics of some sort. But what are rotation and revolution exactly, and how are they different?
Microwave Radiation
The microwave band is actually a subset of the broader radio band. But when the term
Albert Einstein Biography
Hermann Einstein, a featherbed salesman who later ran an electrochemical works and Pauline Koch were married in Stuttgart-Bad Cannstatt, Germany. Their son, Albert Einstein was born on March 14, 1879 in Ulm, Württemberg, Germany. Six weeks after Albert's birth, the family moved to Munich. Albert Einstein died on April 18, 1955 in Princeton, New Jersey. He was cremated at Trenton, New Jersey at 4 pm that same day and his ashes were scattered at an undisclosed place.
Gravitational Pull
Definition: Gravitational Pull; The attraction that one object has for another object due to the invisible force of gravity. The mass of an object affects its gravitational pull. The gravitational pull of the Sun keeps the planets in orbit around it.
Visiting the Stennis Space Center
Visiting the Stennis Space Center. StenniSphere, Stennis Space Center's award winning visitors center, offers exciting new exhibits and stage shows. Travel to the Red Planet! Land the Space Shuttle! Go aboard the International Space Station!
Top Microsoft XBox and Xbox 360 Space Games
Grab yourself the hottest videogaming value around with the incredible Microsoft XBox and Xbox 360. This amazing system has taken the gaming world by storm. The Xbox by Microsoft gives players the speed of a cutting edge PC and the easy-of-use of a video game system.
Should Pluto Be a Planet? Why the Debate...
In 2006 the International Astronomical Union stripped Pluto of its planet-hood, demoting it to dwarf planet status. But the debate has raged on ever since. So should Pluto be a planet, and in the end does it even matter?
Lunar Eclipses
When the Sun, Earth and Moon are aligned, the Earth will cast a shadow on the Moon creating a phenomenon known as a lunar eclipse. These events have been the subject of mythology and lore, but are readily explained by science.
Edmund Halley
Edmund Halley - More Than Just A Comet. Edmund Halley was born October 29, 1656 in Haggerston, Shoreditch, England. Thanks to a later change in the calendar system, his birth date is now considered to be November 8. His father, also Edmund, was a wealthy soap-maker in London. Besides his soap business, the elder Halley owned a number of properties in London.
All About Benjamin Banneker, the First...
Benjamin Banneker was an African-American astronomer, clockmaker, & publisher who was instrumental in surveying the District of Columbia. Banneker taught himself astronomy & advanced mathematics. He turned his attention to both subjects. His study of astronomy enabled him to make the calculations to predict solar & lunar eclipses, even correctly contradicting experts of the day, & to compile an ephemeris for his Benjamin Banneker's Almanac. He became known as the Sable Astronomer.
Aristotle Biography
Aristotle was so impressive as a student at Plato's academy that he soon became a teacher, and a pioneer in physics and astronomy. Read his biography.
Astronomy and Space Gift Guide
Do you need to buy a gift for someone who has an interest in astronomy or space exploration? Here's some great information to have on hand before going to the store or retail website to purchase gifts with an astronomy or space twist. We've divided them by type of recipient.
Top 10 Astronomy & Space Magazines
Now, stay informed with these top astronomy and space magazines which deal with astronomy & astronomers as well as space exploration from the early days into the future. Discover new space and astronomy magazines to bring you the news that interests you.
The Nemesis Star -- Our Sun's Companion
Several years ago a theory was proposed that sounded more science fiction than science. What if our Sun was actually part of a binary system. Only this other star is very small and barely luminous so we can't readily detect it. Eventually this star would enter the inner part of our solar system, potentially destroying all life on Earth as we know it. Far fetched? Well what was once the stuff of fiction may turn out to be reality.
Astronomy 101 - Big Numbers
Astronomy 101 - Lesson 4 - Big Numbers For a Big Universe. Learn how we use astronomical units to measure our solar system - light years for our galaxy and parsecs and scientific notation for the universe. Discover the meaning of big numbers like astronomical units light years and parsecs and how to write them in scientific notation for the measurement of our universe.
Hypergiant Stars
While our Sun is of above average mass compared to other stars in our galaxy, it is still quite small compared to the most massive stars around. There are more than a dozen stars known to have masses form than 100 times that of our central star. Most of these stars are classified as hypergiants.
Space Disasters and Tragedies
Space is a dangerous place. In all of human endeavor, there is danger. It is not possible to completely avoid risk. Even if you choose to hide in your home, some danger still exists. To live is to risk, but there are those, particularly those who work for the betterment of mankind, who risk more than others. From the fire and police officials who entered two buildings struck by terrorists in New York to the seven members of the space shuttle Columbia crew, exploring the final frontier.
Pythagoras Pictures Gallery
Pythagoras, the son of Mnesarchus and Pythais, was born on the island of Samos, off the coast of Asia Minor (what is now mostly Turkey), about 569 BC. Besides his contributions to mathematics, Pythagoras was essential to the early field of astronomy. As Plato later would believe, Pythagoras felt the sphere was the perfect shape. This may have lead to his assertion that the Earth was a sphere. Unfortunately, the actual date or place of Pythagoras's death has been lost to history.
Harvest Moon
September’s full moon, the Harvest Moon, has a special place in our agricultural history. Through most of the year, the moon rises each day about 50 minutes later than the day before. However, when the autumnal equinox approaches, the difference in rise times drops to about 25 to 30 minutes and even farther north, the difference is 10 to 15 minutes. As the Harvest Moon rises after sunset, this provides extra minutes of light each evening for farmers to work longer hours harvest their crops.
Dogs in Space
Dogs in Space - This Short History of Soviet Canine Cosmonauts Introduces Dogs in Space. The first Earthling in space blasted off on November 3, 1957. Sputnik 2, the world's second artificial satellite, was launched by the Soviet Union from the Baikonur Cosmodrome. There was a passenger on board and her name was Laika Russian for Barker. Learn more about dogs in space.
Laws of Planetary Motion
Johannes Kepler (1571-1630) was a German astronomer and mathematician. After Tycho Brahe (1546-1601) settled in Prague in 1599 (then the site of the court of the German emperor Rudolf) and became court astronomer, he hired Johannes Kepler to carry out his calculations. Kepler had studied astronomy long before he met Tycho; he favored the Copernican world-view and corresponded with Galileo.
Why Do Some Stars Twinkle?
Why Do Some Stars Twinkle? Frequently Asked Questions About Space - Basics Series; What You Need To Know About Space. Discover the answers to some frequently asked questions about space.
What is a Star?
When you gaze out into the darkness of space you will undoubtedly notice tiny balls of light shimmering in the night. What are these beautiful objects? Well, most of them are stars and there are billions upon billions of them out there waiting to be discovered.
How To Buy a Telescope
Telescope Purchase - So, you've been stargazing for a while with your naked eye or binoculars and you want to move up to a telescope. Buying a telescope is one of the biggest decisions for an amateur astronomer. If you are not really sure how to buy a telescope, it can be a daunting task. Follow these simple steps and we'll tell you how to buy a telescope.
One of the theoretical consequences of general relativity is the existence of regions of space known as wormholes. While it is not completely understood how such places are created, there is currently no observational evidence to prove that they do, they could provide a means of traveling across the Universe nearly instantaneously. So what is this mysterious phenomenon and will we ever be able to harness their potential?
What is Matter?
Matter is all around us, it is the physical material of the Universe. But there is more to matter than just mass.
NASA Discovers a New Planet In Our Solar System
Literally Planet X, especially if you use Roman numerals. NASA scientists have discovered a 10th planet in our solar system. The planet, larger than Pluto, was discovered using the Samuel Oschin Telescope at Palomar Observatory near San Diego, Calif. The discovery was announced today by planetary scientist Dr. Mike Brown of the California Institute of Technology in Pasadena, Calif., whose research is partly funded by NASA.
All About Guion 'Guy' Bluford, the First...
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Top 6 Skill Level 2 (two) and 3 (Three) Model...
Model rocketry is a great tool for learning about space exploration and physics. It is also a fun hobby. Blast your own model rockets into space with this fun and exciting hobby. Here, we feature some of the best skill level 2 (two) and 3 (three) model rocket kits. Find the model rocket kit that is right for you.
30 Minute Rocket - Build an Air Powered Bottle...
You can make a 30 Minute Rocket with straws and a soda bottle. What you need: plastic soda pop bottle, one thin drinking straw, one thick drinking, straw, tape, clay, scissors, and copy or computer paper. Follow the instructions for the 30 Minute Rocket. Give the bottle a quick squeeze. You have an air bottle rocket!
Free Astronomy and Space Posters - Printable...
Print these free astronomy and space posters from your home computer to create your own astronomy and space posters.
Edwin Hubble
Edwin Hubble was born November 29, 1889 in Marshfield Missouri. During his academic career, Hubble made the amazing discovery that the universe extended well beyond the Milky Way Galaxy, and that there were many more galaxies that lay in the distance. Hubble also later played an important role in determining that the universe is expanding.
What You Should Know About 'Space Junk'
Space junk is debris in orbit around Earth and can pose a threat to orbital and ground-based operations.
Georges-Henri Lemaitre Biography
Georges-Henri Lemaitre was born in Charleroi, Belgium on 17 July 1894. Lemaitre studied humanities at a Jesuit school before entering the civil engineering school of the Catholic University of Leuven at the age of 17. Georges-Henri Lemaître is credited with proposing the Big Bang theory of the origin of the universe, although he called it his hypothesis of the primeval atom. He died on the 20th of June 1966.
Sir Isaac Newton
Biography of Sir Isaac Newton, the man who developed the laws of universal gravitation. Page 2.
How Does a Star Really Work?
We didn't always know how stars worked, but astronomers now know how stars generate heat and light.
Astronomy, Astrophysics and Astrology
A comparison of the terms astronomy, astrophysics and astrology. Often confused, the differences and similarities are analyzed and discussed.
Biography of Giordano Bruno
Giordano Bruno, former Dominican Priest turned philosopher tortured and killed by the Catholic church for espousing a belief that planets existed around other stars in the universe. Bruno's book
star - from an ever growing glossary of space and astronomy definitions. Find the definitions for star and all your space and astronomy related words in this online dictionary - glossary.
Time Travel
Nearly all of us have wished, at one time or another, that we could travel through time. Whether it is to correct a mistake in the past, or to fast-forward to a much anticipated future event, the lure of time travel is unmistakable. But what does science say about time travel? Come along as we see whether it is possible to travel into the future.
Astronomy 101 - Modern Astronomy
Astronomy 101 - Modern Astronomy - Lesson 3: Astronomy Enters the Twentieth Century
Top 8 Telescopes Between 500 and 1000 Dollars
If you have spent some time observing the sky with your naked eyes and a pair of binoculars, you may be ready to move on up to telescopes. As in most things in life, you typically get what you pay for. If you are looking for better telescopes to start out with, one which might carry you from a beginner to intermediate stargazer, check out these beginner's telescopes ranging from $500 to $1000.
Top 10 30 Minutes Or Less Activities
These astronomy & space activities can keep you or your kids busy while they are learning and having fun at the same time.
Dr. Neil deGrasse Tyson Biography
Dr. Neil deGrasse Tyson Biography. Dr. Neil deGrasse Tyson is the Frederick P. Rose Director of the Hayden Planetarium at the American Museum of Natural History and Visiting Research Scientist and Lecturer at Princeton University.
What Causes the Seasons on Earth
This is one of the most misunderstood concepts. Perhaps the confusion arises out of our everyday experiences with heat and temperature, perhaps it is just a lack of education on the matter. But ultimately, it seems most people don't have a clear understanding of Earth's seasons. So what are the reasons for the seasons?
11 Things About Jupiter You Probably Didn&rsquo...
Jupiter, the king of the planets, is the largest and heaviest of the planets in our solar system. Perhaps best known for the giant red storm on the surface, Jupiter has many features that may surprise people. So check out our list of the most interesting facts about Jupiter.
Top 7 Beginner's Telescopes Between 300.00 and...
If you have spent some time observing the sky with your naked eyes and a pair of binoculars, you may be ready to move on up to a telescope. As in most things in life, you typically get what you pay for. If you are looking for a better telescope to start out with, one which might carry you from a beginner to intermediate stargazer, check out these beginner's telescopes ranging from $300 to $500.
ellipse - from an ever growing glossary of space and astronomy definitions. Find the definitions for ellipse and all your space and astronomy related words in this online dictionary - glossary.
Astronaut Costumes for Adults
Want an astronaut costume? From Halloween to costume parties to plays or skits, any time you need a costume, check out these space related costumes ideas for adults. From astronaut costumes to alien costumes ideas.
Sir Isaac Newton Quotations
Quotations from and about Sir Isaac Newton, the man who developed the laws of universal gravitation.
Constellations Pictures - Andromeda - Picture...
Andromeda, daughter of Cepheus and Cassiopeia. - Genitive: Andromedae Abbreviations: And, Andr Right Ascension, (h): 1 Declination, (deg): 40N
Dwarf Planets
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