Outer Space & Universe
Outer Space & Universe
Space, also known as outer space, is the near-vacuum between celestial bodies. It is where everything (all of the planets, stars, galaxies and other objects) is found.
On Earth, space begins at the Kármán line (100 km above sea level). This is where Earth's atmosphere is said to stop and outer space begins. This is not a firm boundary but is a convention used by scientists and diplomats.
Items in space are free to move back and forth; up and down; and left and right. These three dimensions are what make 3D space. Items also move forward through time, which is sometimes called the fourth dimension.
The majority of space contains very little matter and so most of it is a vacuum. Scientists do not know how big space is but we do know that space is extremely big, and is always expanding.
According to the big bang theory, all matter and energy in the Universe was compressed into a very small space. Then it exploded and started expanding. Space is still growing in size today; this means the distance from one galaxy to distant galaxies is getting longer.
Gravity is the force that keeps the Moon in orbit around the Earth and the planets in orbit around the Sun. Gravity can stretch and bend space similar to how a heavy ball placed on a stretched sheet of rubber will cause the rubber to stretch. The scientist who discovered that space can bend is named Albert Einstein. How gravity bends space is part of his theory of general relativity.
Astronauts, Cosmonauts, Taikonauts and Spationauts
An astronaut is any person who is trained by NASA to travel and perform tasks in space. Although the space traveler may not necessarily be a United States citizen, each astronaut does go through a rigorous training regiment by the National Aeronautics and Space Administration. Other space travelers go by other names then astronaut depending on their country of origin.
In the United States, astronaut is derived from the Greek words ástron (star) and nautis (sailor). While, in Russia, a space traveler goes by the name космонавт (English: cosmonaut), which is derived from the Greek words kosmos (universe) and nautis (sailor). Westerners call a space traveler from China a taikonaut, based on the 1998 writings of Chiew Lee Yik and Chen Lan where the term tàikōng (great emptiness), Chinese for “space”. In China, the term yuháng yuán (universe navigator) is used for space traveler.
Only the United States of America (United States), Russia (earlier, the Union of Soviet Socialist Republics), and the People’s Republic of China (China) have sent manned spacecraft into space. Other countries have assisted these countries by sending their own space travelers on space missions. For instance, a French space traveler is called a spationaut (from the French word spationaute), which is derived from the Latin spatium (space) and Greek nautis (sailor). (plural in Greek nautes = sailors)
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Fmr. NASA astronaut Mike Massimino walks on the lunar surface in the virtual reality experience “A Moon for All Mankind” (AMFAM) at Samsung 837 in New York City.Credit: Space.com / footage courtesy Samsung / produced and edited by Steve Spaleta http://www
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We're looking at some serious flooding possible all up and down the East coast and into the South over the next 2 weeks. Also, the Heat surges over the next week will be shattering some records. The worst weather is still to be found in Asia Pacific. They
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The European Southern Observatory’s Very Large Telescope used it new adaptive optics mode, known as laser tomography, to capture an incredible view of Neptune. -- Full Story: https://www.space.com/41202-new-adaptive-optics-produces-stunning-views.htmlCred
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A new cycle of the NASA iTech initiative kicks off today with a call for technical solutions to fill gaps in areas identified as having a critical impact on future space exploration.The request for a five-page white paper is the first phase of 2018 NASA i
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European Space Agency (ESA) astronaut, well-known for his amazing imagery of Earth from the International Space Station, captured another amazing view. The video was “filmed 12.5 times faster than actual speed,” according to ESA. -- Read more about it: ht
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There are many heroes at NASA, and they’re not just astronauts. In this episode of “So You Want to Go to Mars?” we take a special behind the scenes look at spaceflight and discover the heroes that are solving the major challenges of our space missions tod
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On July 17, 1962, the American test pilot Bob White broke the world record for the highest altitude flight. He took off from Edwards Air Force Base in a rocket-powered X-15 aircraft and made it to an altitude of 314,750 feet. That's almost 60 miles! At th
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An uncrewed Cygnus OA-9 spacecraft departed the International Space Station on July 15, 2018. It will deorbit and burn up in the Earth's atmosphere is a few weeks. -- Full Story: https://www.space.com/41172-cygnus-leaves-space-station-orbital-boost.htmlCr
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NASA's Space to Ground is your weekly update on what's happening aboard the International Space Station. Got a question or comment? Use #spacetoground to talk to us.Learn more about the important research being operated on Station:https://www.nasa.gov/iss
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The Arecibo Observatory and the Green Bank Observatory pinged binary asteroid YE5 during a recent flyby of Earth. The asteroids were 3.7 million miles (6 million kilometers) away on June 21, 2018. -- Full Story: https://www.space.com/41154-rare-binary-ast
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The detection of a single neutrino by the IceCube neutrino telescope at the South Pole on Sept. 22, 2017 sparked a global effort to find its source. -- Full Story: https://www.space.com/41146-neutrino-source-blazar-cosmic-rays.htmlCredit: Space.com / anim
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