Space/Astronomy: Most Popular Articles
Let's see what's new in the solar system and its many worlds!
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.
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.
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.
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.
Did you ever see Mars dance in the pale moonlight? Early October is your chance.
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.
You can see thousands of stars when you look up at night. Here are the Top 10 Closest Stars to our solar system.
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.
It was July 20, 1969 when Neil Armstrong spoke what must be considered the most famous words of the 20th century,
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.
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.
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?
What would a spacecraft say if it could know what its future mission would be? New Horizons tells us its tale of future exploration.
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.
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.
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.
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.
When the Challenger explosion occurred, it shocked the nation, started a NASA investigation, and led to many changes in the shuttle program.
Constellations information. Discover more about each of the 88 modern constellations. Find the names, information, and pictures of the 88 constellations.
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?
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.
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?
Free Basic Astronomy course. Astronomy 101 - Pass a simple 20 question quiz to receive your certificate.
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?
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?
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.
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 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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
Dr. Mae Jemison was the first African-American female astronaut in Space. Read her brief biography.
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.
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.
One of the questions that is often wrongly answered about astronomy pertains to the rotation of the Moon. Specifically, does the moon rotate? The answer is yes, but very slowly. And not only that, but it rotates in a very precise manor as the Earth and Moon interact and cause our natural nightlight to always show us the same face.
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.
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.
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.
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.
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?
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.
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.
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.
Do you know your cosmic address? Astronomers have discovered our Local Supercluster and named it!
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 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.
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?
The biography of Valentina Tereshkova, the first woman in space. The USSR sent Tereshkova into space many years before NASA sent astronaut Sally Ride.
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 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.
Space Firsts - Space Basics - Firsts In Space exploration - Space Firsts - Basics Series; What You Need To Know About Space. Discover who did what and when in these space firsts. From the first Earthling in space to the first man on the moon.
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?
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.
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.
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.
The microwave band is actually a subset of the broader radio band. But when the term
Discover the basics of telescope astronomy with this guide. Telescopes come in three basic designs; Refractor, Reflector, and Catadioptric.
Neptune is one of the most interesting objects in our solar system. It shares commonalities with its
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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?
: Is There Such a Thing as a Planet Sound? You can go on eBay right now (NASA has stopped producing copies
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.
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?
So, who did invent the telescope? Learn this and other space and astronomy-related frequently asked questions here.
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?
We've all heard the phrase. Space / Astronomy.
An icy world beckons. Wouldn't you like to explore its surface?
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.
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.
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.
When a meteorite is found, the ANSMET (Antarctic Search for Meteorites) team records its location, size, color, amount of fusion crust, probable type, and anything else that might be important. Some of their tools are similar to those used by the Apollo astronauts to collect samples, and some are the latest high-tech (like Global Positioning Satellite navigation). The team takes great care not to contaminate the meteorites.
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.
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.
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.
Meteors are bits of material falling through Earth's atmosphere. Read more to find out how much meteoric material falls each day.
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.
Pluto is mostly brown. This picture captures the true colors of Pluto as well as the highest surface resolution so far recovered. No spacecraft has yet visited this most distant planet in our Solar System. The above map was created by tracking brightness changes from Earth of Pluto during times when it was being partially eclipsed by its moon Charon. The map therefore shows the hemisphere of Pluto that faces Charon. Page 8.
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.
According to Sheila Ann Manuel Coggins, the About Guide to Weblogs, the definition of a Weblog or Blog
Earth Globe 11/20/1998 . Space / Astronomy. Page 17.
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.
Supernovae are some of the most dynamic events in the Universe. They create such intense explosions that the light that they emit can outshine entire galaxies. But the compact objects that are left behind are also incredibly powerful as well.
Visiting The Jet Propulsion Laboratory. The JPL Public Services Office offers tours free of charge for groups and individuals on an advance reservation basis. You must speak with a Public Services Office representative in order to reserve a tour. Reservations may not be made via e-mail, voice mail or fax.
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.
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.
On January 28, 1986, the world lost one of its greatest resources, Christa McAuliffe, the space shuttle Challenger astronaut teacher.
A look at a few of the many astronomy books available to help people learn more about the sky.
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.
NASA's first space-based telescope was named for American astronomer Edwin P. Hubble. It was launched in April, 1990 from space shuttle Discovery.
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Stars - Quiz on Stars Try Your Hand at This Simple Quiz About Stars Discover What You Know About Star
Should we be worried about asteroids? What are these objects and where do they come from? The majority arise from an area between Mars and Jupiter.
Discover Mars. Space / Astronomy.
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. So, join me as we run down the most interesting facts about Saturn.
Mercury - Pictures and Astronomy Facts - Solar System Planetary Astronomical Data and Images of Mercury. Mercury. Astronomy Guide to Space exploration close to home. Information on our solar system. Mercury planetary data and graphics.
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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.
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?
This is how the Earth looked as photographed from a point near the Moon by the Apollo 8 astronauts. The Earth fills less than one percent of the frame exposed through 80mm lens. North is approximately vertical. Kinda lonely, isn't it? . Page 18.
The world's first view of Earth taken by a spacecraft from the vicinity of the Moon. - The photo was transmitted to Earth by the United States Lunar Orbiter I and received at the NASA tracking station at Robledo De Chavela near Madrid, Spain. This crescent of the Earth was photographed August 23, 1966 at 16:35 GMT when the spacecraft was on its 16th orbit and just about to pass behind the Moon. . Page 13.
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?
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 - Pictures and Astronomy Facts - Solar System Planetary Astronomical Data and Images of Earth. Earth. Astronomy Guide to Space exploration close to home. Information on our solar system. Earth planetary data and graphics.
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.
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.
Cold, distant, Pluto was the only planet in our Solar System which had not been visited by a spacecraft
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.
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.
The first in a series of discussions about the language that astronomers and space scientists use.
Andromeda, daughter of Cepheus and Cassiopeia. - Genitive: Andromedae Abbreviations: And, Andr Right Ascension, (h): 1 Declination, (deg): 40N
Even the earliest humans were aware of the Moon. Besides the Sun it is the most dominant object in the sky. But how was it made? Where did it come from? These questions puzzled people for millennia. And while not an absolute, we now believe that we know how the Moon was made.
Everyone has to start somewhere. 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. 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 reflectors and refractors. Less expensive telescopes.
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.
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.
Voyager 1 was launched after Voyager 2, but because of a faster route, it exited the asteroid belt earlier than its twin. It began its Jovian imaging mission in April 1978 at a range of 265 million kilometers from the planet; images sent back by January the following year indicated that Jupiter's atmosphere was more turbulent than during the Pioneer flybys in 1973 and 1974.
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.
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The Water Pump - Genitive: Antliae Abbreviations: Ant, Antl Right Ascension, (h): 10 Declination, (deg): 35S . Page 2.
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
Not all stars are the same; some are smaller, some are larger, some are red, some are blue. While these stars may be different in a variety of ways, they all spend most of their lives on what is known as the main sequence. Here, stars fuse hydrogen into helium to sustain themselves, but when that hydrogen runs out, these stars can lead vastly different lives.
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.
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
Astronomy 101 - Astronomy History - Seeing Is Believing - Lesson 2: History - A Renaissance in Science
Comets are amazing objects, and can be quite beautiful when viewed through a telescope or, if lucky, the naked eye. But where do this fascinating objects come from?
When we see stars in the night sky we are observing the radiation that escaped from their surface hundreds, thousands and perhaps millions of years ago. In order for us to be able to see such distant objects, these stars must emit massive amounts of energy. The measurement of this energy release is the luminosity.
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.
Dive from space to practically any address you choose. Want to see what your house looks like in a satellite image? Now, you have the chance with the free 3D mapping and search product, Google Earth. Google Earth launched in June of 2005. Google Earth is a satellite imagery-based mapping product that combines 3D buildings and terrain with mapping capability and search. Google Earth is a free download.
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.
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.
It is a term that seems to be used for many applications: light, nuclear danger, medical imaging and more. So what is radiation exactly?
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.
When massive stars leave the main sequence they usually become red supergiants. However, they will tend to oscillate between various other supergiant stages, including becoming a blue supergiant. In this phase the star is smaller, yet hotter than the other supergiants.
Canopus is the 2nd brightest star in the sky. Its name either comes from an ancient city in northern Egypt or the helmsman for Menelaus. Menelaus was the king of Sparta during the Trojan war. He was brother of Agamemnon & married to Helen, the cause of the war. Canopus is so bright it is used as a reference point for navigation of spacecraft launched on interplanetary missions. It is located in the southern sky and not visible north of Norfolk, VA. Canopus is located in the constellation Carina
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.
Apollo 11 Mission - First Humans on the Moon. The Space Race, and competition to land on the moon was a product of the Cold War. Not only was it an effort to prove technological superiority, but there was also a real fear on both sides that the other might place weapons of mass destruction in space.
Are you ready to move on up to a better telescope? As in most things in life, you typically get what you pay for. Do you want to become a serious amateur or even a professional? Check out these telescopes over $10000.00. With these telescopes, portability is definitely less of a factor. In fact, if you have plans to build your own observatory, here's the place to start.
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.
What is a planet? It is one of the questions that I get most often in my astronomy class, and its a question that is at the source of great controversy. In 2006 the International Astronomical Union decided to answer that question and in doing so stripped Pluto of its planet-hood. The resulting fallout has caused rifts within the scientific community. All because of one, simple question: what is a planet?
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.
In ancient cultures comets were seen as omens and were therefore looked upon with reverence and fear. But these beautiful objects are little more than balls of dust and ice that orbit around our Sun. However, those that do stray into our path can cause significant damage, and may have been responsible for some of histories mass extinctions.
Sun Quiz Try Your Hand at This Simple Quiz About The Su
Epsilon Eridani (tenth closest star to Earth) is the closest star known to have a planet (Epsilon Eridani b), and an unconfirmed second planet (Epsilon Eridani c). While it is smaller, cooler and slightly less luminous than our own sun, Epsilon Eridani is visible to the naked eye. It is the third closest star that is viewable without a telescope.
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?