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Space/Astronomy: Most Popular Articles

These articles are the most popular over the last month.
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.
10 Bright Stars as Seen from Earth
Stars are scattered across our night sky and show us different degrees of brightness. Learn more about the ten brightest ones seen from Earth.
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.
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.
Constellations Pictures Gallery
Constellations information. Discover more about each of the 88 modern constellations. Find the names, information, and pictures of the 88 constellations.
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.
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.
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.
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.
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.
Death from the Skies via Gamma-ray Burst?
Gamma-ray bursts (GRBs) are powerful events in the universe. They are quite distant, but we often wonder if a GRB was close, could it destroy life on Earth?
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?
All About Guion 'Guy' Bluford, the First...
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Meet Mae Jemison: Doctor, Astronaut, Star Trek...
Dr. Mae Jemison was the first African-American female astronaut in Space. Read her brief biography.
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?
What Are Black Holes?
A favorite phenomenon of science fiction writers, black holes are real objects that play an important role in our Universe. Learn more about them here.
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.
What's the Largest Star in the Universe?
Let's visit some of the largest stars known to astronomers. Most of them lie within the Milky Way Galaxy.
A New Look at Our Solar System
This isn't our parents' solar system anymore. In the last 50 years, our views of the Sun, planets, moons, rings, asteroids, and comets have changed with new discoveries.
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.
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 Sun. Their distances are measured in light-years, the distance light travels in a year.
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.
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.
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.
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.
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.
Hanky-panky in Space?
One of the most popular questions fielded by astronauts posits the idea of sex in space. This article examines the physical issues around this touchy subject.
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?
A Kids' Guide to the Sun and Planets
A collection of facts about the solar system for kids and students to learn and enjoy.
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.
Red Giant
Once stars like our Sun have exhausted the hydrogen fuel in their cores their cores will compress and heat up. This action causes the energy generated by the increasing temperature to expand the outer envelope of the star, creating a Red Giant.
The Brightest Star in the Nighttime Sky
Sirius, also known as the Dog Star, is the brightest star in the sky. Learn more about it here.
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,
Dick Scobee: One of the Challenger 7
Find out more about the late astronaut Francis R. (Dick) Scobee. He was the Space Shuttle Challenger STS-51L Mission Commander on its tragic final flight.
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.
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.
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.
Remembering Ronald E. McNair
Biography of Ronald E. McNair (Ph.D.) - NASA Astronaut (Deceased). Space Shuttle Challenger STS-51L Mission Specialist Ronald E. McNair
African-Americans in Astronomy and Space for...
Celebrating Black history Month, African-Americans have played a major role in the history of the United States of America and have much to be proud of. Here, we would like to celebrate just a few of the achievements of African-Americans in the fields of astronomy and space. This list is but a drop in the bucket and while it will continue to expand will never be complete. Discover some role models for Black History Month.
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.
Constellations Pictures - Andromeda - Picture...
Andromeda, daughter of Cepheus and Cassiopeia. - Genitive: Andromedae Abbreviations: And, Andr Right Ascension, (h): 1 Declination, (deg): 40N
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.
The Basics of Telescopes
Discover the basics of telescope astronomy with this guide. Telescopes come in three basic designs; Refractor, Reflector, and Catadioptric.
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.
Visit Neptune: The Most Distant Planet
Neptune is one of the most interesting objects in our solar system . It shares similarities with its
Defining "Planet" Isn't as Easy as You'd Think
What is a planet? The answer is at the source of great controversy. Scientists are working to create a new and better definition of planet.
Anatomy of a Shuttle Disaster
When the Challenger explosion occurred, it shocked the nation, started a NASA investigation, and led to many changes in the shuttle program.
Stellar Oddballs and Where they Come From
Supernovae may be the end points of massive stars, but they create compact objects that are some of the oddest denizens in the cosmic zoo.
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?
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.
The Untold Story of the Teacher Who Died on the...
On January 28, 1986, the world lost one of its greatest resources, Christa McAuliffe, the space shuttle Challenger astronaut teacher.
What Kind of Telescope Should I Get?
The question is: What telescope should I buy for my friend/loved one/child/myself? Here are some thoughts about that, with some blunt advice on what NOT to do.
Life on the Stellar Main Sequence
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The Southern Hemisphere Sky Boasts a Bright...
Canopus is the second-brightest star in our sky and the brightest in the constellation Carina. If you live far enough south, you can see it along with Sirius.
Defining the Cosmological Constant
The Cosmological Constant was once thought to be a way around a difficult problem in cosmology. Then it was though to be a mistake. Now, a new version might help explain a mystery in astronomy.
Give 'Em the Moon, Planets, and Stars!
Some gift ideas for the space-enthusiast Valentine in your life -- ranging from daily space news and a visit to the planetarium to naming a crater on a map headed for Mars!
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.
Discover the Heliocentric Theory, or Sun-center...
Discover the Heliocentric theory and how Nicolaus Copernicus made it popular.
Doctor Mae Jemison Pictures Gallery
Chemical engineer, scientist, physician, teacher and astronaut, Dr. Mae Jemison has a wide range of experience in technology, engineering, and medical research. In addition to her extensive background in science, she is well-versed in African and African-American Studies, speaks fluent Russian, Japanese, and Swahili, as well as English and is trained in dance and choreography. In completing her first space flight, Dr. Mae Jemison was the first African-American woman in space.
Constellations Pictures - Antlia - Picture of...
The Water Pump - Genitive: Antliae Abbreviations: Ant, Antl Right Ascension, (h): 10 Declination, (deg): 35S . Page 2.
What Happens to Aging Stars Like the Sun
Stars evolve and die. How they do this depends on their mass. Stars like our Sun will eventually leave behind a stellar remnant known as a white dwarf. But what are these objects?
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.
The Planet Uranus
The planet Uranus is the seventh planet from the Sun, and while it does have some commonalities with its neighbor Neptune, it is also very unique in many ways. This large, gaseous, somewhat icy and undeniably beautiful planet has been acknowledged for millennia, but was curiously re-discovered in 1781 by Sir William Herschel.
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.
10 Interesting Facts About the Planet Venus
Venus is a planet that has fascinated people for centuries. Modern scientific studies show that it is not a habitable planet.
There May be a Giant Planet out in the Kuiper...
Astronomers may have found a massive world in the outermost reaches of the solar system. Now, they need to make observations and confirm its existence.
Supernovae
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.
The Lunar Far Side Beckons
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.
Milestones in Space Exploration History
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What Happens to the Human Body in a Vacuum?
class="no-js" itemscope itemtype="http://schema.org/Article" > itemprop="description" >In the 1981 movie
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?
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.
Cool Facts about Beautiful Planet Saturn
Saturn is best known for its beautiful and distinctive rings. But this is just one of the amazing facts about the second largest planet in our solar system.
Rotation and Revolution: Two Important...
Rotation and revolution are terms vital to the study of astronomy. What do they each mean?
Does the Moon Rotate?
Does the Moon rotate? This question often confuses people, so let's take a look at what the Moon does.
When Can We Expect to See Halley's Comet Next?
Comet Halley has stoked the interest of skywatchers for centuries as it returns to swoop around the Sun about every 76 years.
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?
How We Measure the Brightness of Stars
Luminosity is a term astronomers use to express the brightness of a celestial object. Luminosity helps them understand an object's distance, temperature, and other characteristics.
Astronaut Dr. Bernard Harris, Jr. Biography
Dr. Bernard Harris, Jr. Biography - First African-American to Walk in Space. Dr. Bernard Harris, Jr. was born on June 26, 1956, the son of Mrs. Gussie H. Burgess, and Mr. Bernard A. Harris, Sr. A native of Temple, Texas, he graduated from Sam Houston High School, San Antonio in 1974. He received a Bachelor of Science degree in biology from University of Houston in 1978 before follwoing that up with a doctorate in medicine from Texas Tech University School of Medicine in 1982.
You are Descended from Astronomers
An opinion piece about five of the many, many reasons humans study the sky.
Supermassive Black Holes
Supermassive black holes are some of the most powerful objects in the Universe. These incredible objects hold entire galaxies together and are capable of releasing incredible amounts of energy. Their formation is still a mystery. And some believe they may hold the key to exotic subjects of science fiction like interstellar travel and, possibly, time travel.
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.
Top 10 Astronomy and Space Weblogs
According to Sheila Ann Manuel Coggins, the About Guide to Weblogs, the definition of a Weblog or Blog
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.
Robert Henry Lawrence, Jr. Biography
Robert Henry Lawrence, Jr. - Astronaut - Cosmonaut Memorial. Biography of Robert Henry Lawrence, Jr. - 1st African-American Astronaut.
Meet the Star Closest to the Sun and Earth
Come learn about Proxima Centauri, the closest star to our Sun at the present time.
Blue Supergiants Live Fast, Die Quickly, and...
Blue supergiant stars are among the brightest, hottest, and most massive stars in universe. Learn more about them and how they live and die.
Volcanic Venus Surprises Scientists
Recent studies of the surface of Venus have revealed volcanic hotspots, proving that the planet is still active inside.
Learn about Mars!
Mars Information. Astronomy Guide to Space exploration close to home. Information on planets in our solar system. Information on Mars, the red planet.
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?
The Moon: an Executive Summary
What's the Moon? Where did it come from? Why is it cratered? What's a Blue Moon? Here's a quick look at some Moon facts.
Are Aliens Among Us?
Have aliens walked among us? What evidence do we need to seek out answers to whether or not our planet has been visited by beings from other worlds?
Meet the Red Supergiant of Orion
Meet the aging supergiant star in the shoulder of Orion -- Betelgeuse. It will explode as a supernova in the next million years or so and astronomers are watching closely!
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.
Hans Lippershey Biography
Hans Lippershey was probably not the first person to experiment with combining lenses to create crude telescopes, but he applied for a patent in 1608.
Earth: Learn About our Place in the Solar System
Learn the basics about Earth -- our home planet and the only planet in the solar system known (so far) to support life.
The Surprising Origin of the Phrase "Once in a...
We've all heard the phrase. Space/Astronomy.
Check out astronomy and space-related magazines!
These magazines provide good sources of information about astronomy and stargazing, and most have online presences too.
Mercury 13
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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.
Are Wormholes a Method of Space Travel?
One of the theoretical consequences of general relativity is the existence of regions of space known as wormholes. What are they and will we ever be able to harness their potential?
Meet Neil deGrasse Tyson!
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.
Astronomy and Space Timeline
Astronomy and Space History Timeline. The history of astronomy and space exploration timeline.
Pictures of Mae Jemison - Official portrait of...
Official portrait of STS-47 Endeavour, Orbiter Vehicle (OV) 105, Spacelab Japan (SL-J) Mission Specialist Mae C. Jemison wearing launch entry suit (LES) and holding helmet. Jemison is an M.D., a 1987 astronaut candidate, and member of Astronaut Class 12. . Page 4.
How Big Can a Star Get? Meet the Hypergiants!
Learn about hypergiant stars -- the behemoths of the galaxy. They are born hot and heavy, live fast, die young, and leave behind some truly odd remains!
The Songs of Distant Planets
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How Are Astronomy, Astrophysics, and Astrology...
A comparison of the terms astronomy, astrophysics and astrology. Often confused, the differences and similarities are analyzed and discussed.
Microwave Radiation
The microwave band is actually a subset of the broader radio band. But when the term
Are "They" Out There?
The search for life outside our tiny blue rock continues as astronomers find and study new worlds around other stars. What chance exists that they have life?
Pictures of Stars - Cepheid Variable Star in...
This NASA Hubble Space Telescope image of a region of the galaxy M100 shows a class of pulsating star called a Cepheid Variable. Though rare, these stars are reliable distance indicators to galaxies. Based on the Hubble observation, the distance to M100 has been measured accurately as 56 million light-years (+/- 6 million light-years), making it the farthest object where intergalactic distances have been determined precisely. Page 3.
Rigil Kentaurus Information
Rigel Kentaurus, also known as Alpha Centauri, is the third brightest star in the sky. Its name literally means foot of the centaur. It is actually a triple star system made up of Alpha Centauri A, Alpha Centauri B, and Alpha Centauri C (also known as Proxima Centauri because it is the closet star to earth). Rigel Kentaurus is located in the constellation Centaurus.
Learn Patterns in the Sky
Learn how the star patterns called constellations came to be part of modern astronomy. They are enduring and enjoyable part of our study of the sky.
Deliver the Ultimate Cosmic Gift: the Sun,...
Need gift ideas for that astronomer in your life? Here are a few suggestions for some truly cosmic presents!
Radiation in Space and Astronomy - Definition
It is a term that seems to be used for many applications: light, nuclear danger, medical imaging and more. So what is radiation exactly?
Astronomy 101 - Modern Astronomy
Astronomy 101 - Modern Astronomy - Lesson 3: Astronomy Enters the Twentieth Century
Learn More about the Cosmos!
Looking for a great book in astronomy -- here are a few suggestions to get you started on your road to the sky.
Who Really Invented the Telescope? (Hint: It...
So, who did invent the telescope? Most people think it was Galileo Galilei -- but he turns out to be its most famous user.
Pictures of Mae Jemison - Spacelab-J Crew...
Female astronauts Jan Davis and Mae Jemison undergo training at Marshall's Spacelab-J Crew Training facility. . Page 5.
Peculiar Galaxies
Not all galaxies have the beautiful spiral or elliptical shape that we normally imagine galaxies having. Some are quite unusual in their features and shapes. These galaxies are known as Peculiar galaxies and, in some ways, are similar to their sister galaxies the Irregulars.
Do a Little Astronomy for Your Science Fair...
Need a science fair project? Here are some ideas and links for the astronomy fan in your home or class!
What Are Gamma-ray Bursts?
Gamma-ray Bursts (GRBs) have an interesting history. Discovered while spying on our enemies, GRBs are on of the most powerful and dynamic sources of radiation in the Universe. But what creates such events are still a bit of a mystery.
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.
The Sun's Hot Little Mystery
A look at how tiny flares on the Sun may be heating its outer atmosphere.
Cosmic Beauty
A trip through just a few of Hubble Space Telescope's many beautiful space images.
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.
Information and Pictures of the Planet Neptune
Neptune, the farthest planet form the Sun is very similar to its neighbor, Uranus. However, Neptune is unique in that it has dark storms similar to those on Jupiter. Neptune was also the first planet to be discovered by mathematical prediction. Most of what we know about the blue world has been learned in the last few decades as the Voyager 2 probe provided the most complete image analysis to date.
Pictures of the Star Sirius - The Dog Star,...
This Hubble Space Telescope image shows Sirius A, the brightest star in our nighttime sky, along with its faint, tiny stellar companion, Sirius B. Astronomers overexposed the image of Sirius A [at center] so that the dim Sirius B [tiny dot at lower left] could be seen. The cross-shaped diffraction spikes and concentric rings around Sirius A, and the small ring around Sirius B, are artifacts produced within the telescope's imaging system. The two stars revolve around each other every 50 years. Page 3.
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!
Dwarf Planets
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Comets: Ghostly Visitors from the Outer Solar...
Comets come from the outer solar system and date back to the birth of the Sun, Moon and planets, making them a treasury of information.
The Design Evolution of the Space Suit from...
Ever since Alan Shepard's history making flight in 1961, NASA astronauts have relied on spacesuits to help them work and keep them safe. From the shiny silver of the Mercury suit to the orange
Beth Brown: Pioneering Astrophysicist
Read about one of NASA's pioneering woman scientists, the late Dr. Beth Brown, and her accomplishments in x-ray astronomy and science outreach.
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?
Pictures of Mae Jemison - Female Astronauts
Astronauts Dr. N. Jan Davis (left) and Dr. Mae C. Jemison (right) were mission specialists on board the STS-47 mission. Born on November 1, 1953 in Cocoa Beach, Florida, Dr. N. Jan Davis received a Master degree in Mechanical Engineering in 1983 followed by a Doctorate in Engineering from the University of Alabama in Huntsville in 1985. In 1979 she joined NASA Marshall Space Flight Center as an aerospace engineer.
Binoculars Under \$150.00
Everyone has to start somewhere. Before you spend a lot of money on a telescope, you may want to spend some time observing the night sky with binoculars. Still, even though you want to have the best, it may not be a great idea to spend a lot of money until you're sure you will get your money's worth. Check here for some great binoculars for less money.
Astronomy 101 - Astronomy History - Seeing Is...
Astronomy 101 - Astronomy History - Seeing Is Believing - Lesson 2: History - A Renaissance in Science
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.
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
Constellations Pictures - Apus - Picture of the...
The Crow - Genitive: Apodis Abbreviations: Aps, Apus Right Ascension, (h): 16 Declination, (deg): 75S . Page 3.
What is a Star?
This article explains the basic differences between stars and planets, and how stars work.
The Biography of Nicolaus Copernicus
Disputer of the Ptolemaic System. Creator of the Copernican System. Read the biography of Nicolaus Copernicus.
Can Humans do a Dr. Who and Travel Through Time?
Nearly all of us have wished, at one time or another, that we could travel through time. Could it happen? It already has, on small scales, for astronauts. Learn how.
Pictures of Mae Jemison - STS-47 Endeavour,...
STS-47 Endeavour Official portrait. These seven crewmembers are currently in training for the STS-47 Spacelab J mission. Pictured are Mission Specialist Jerome Apt and Pilot Curtis L. Brown, Jr; and MS N. Jan Davis, MS and Payload Commander Mark C. Lee, Commander Robert L. Gibson, MS Mae C. Jemison, and Japanese Payload Specialist Mamoru Mohri. Mohri is representing the National Space Development Agency of Japan. In the background are the flags of the US and Japan. Page 7.
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.
Constellations Pictures - Aquarius - Picture of...
The Water Carrier - Genitive: Aquarii Abbreviations: Aqr, Aqar Right Ascension, (h): 23 Declination, (deg): 15S . Page 4.
Arcturus Information
Arcturus is the brightest star in the constellation Bootes, which is one of the oldest constellations in the night sky. It is the 4th-brightest star in the entire sky. Arcturus means bear guard, as it overlooks the constellation Ursa Major. It is an orange giant with a diameter about 10 times that of the sun and a luminosity about 100 times that of the sun. At about 36 light-years, Arcturus is one of the nearest giant stars. Arcturus is located in the constellation Bootes.
Radio Waves in Space: What Makes Them!
Radio waves are a form of electromagnetic radiation produced by a number of objects in space. Learn more about them.
The Life of Astronomer Claudius Ptolemy
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.
Meet a Nearby Sun-like Star
Epsilon Eridani is a nearby star that has long fascinated astronomers. Let's take a look at this star and its giant planet.
The Milky Way Galaxy
Our little corner of the cosmic neighborhood: The Milky Way Galaxy. Our understanding of our home is evolved over time, and is just now really coming into focus. So what is the Milky Way Galaxy and what do we really know about it?

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