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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This animation demonstrates the orbital characteristics of the asteroid 6478 Gault that is located 214 million miles from the Sun, between the orbits of Mars and Jupiter.More information and download options: http://www.spacetelescope.org/videos/heic1906a
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Asteroid 6478 Gault is ~2.5-5.5 miles (4–9 kilometers) wide and has "two narrow, comet-like tails of debris," according to ESA/NASA. The Hubble Space Telescope was used to capture image of it. Credit: NASA, ESA, K. Meech and J. Kleyna (University of Hawai
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The SpaceIL's Beresheet spacecraft captured a sunrise while orbiting Earth. It also deployed its landing legs. -- SpaceIL's Beresheet Lunar Lander: Israel's 1st Trip to the Moon: https://www.space.com/spaceil-beresheet.htmlCredit: Space.com / footage cour
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Solar energy is a key element in keeping the International Space Station functional as it provides a working laboratory for astronauts in the unique microgravity environment. Astronauts rely on this renewable energy source to power the electronics needed
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A new 3D visualization has been created of the center of the Milky Way Galaxy as viewed from the position of the black hole Sagittarius A*. -- Visit the Heart of the Milky Way in This 360-Degree, 4K Simulation: https://www.space.com/milky-way-heart-360-de
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NASA astronaut Charles Duke was the navigator of the Lunar Roving Vehicle (LRV) on the Apollo 16 mission. He describes how the rover handled on the lunar surface at the 115th Explorers Club Dinner in Mar. 2019. The Risk of Apollo: Astronauts Swap Harrowin
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Rocket Lab will launch an experimental satellite for the Defense Advanced Research Projects Agency, the first of a planned dozen launches in 2019. It will launch a small satellite (R3D2) for DARPA on the company’s Electron rocket from its launch site in N
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At the 115th Explorers Club Dinner, Apollo 11 astronaut Buzz Aldrin talks about a circuit breaker issue aboard the lunar module while he and Neil Armstrong were on the moon. -- The Risk of Apollo: Astronauts Swap Harrowing Tales from NASA's Moon Shots:htt
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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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Red Bull Air Force wingsuit skydivers dove out of a helicopter flying 4000 feet (1219 m) above Los Angeles, CA on Mar. 20, 2019. They started their dives when the Supermoon was rising. Credit: Space.com / footage courtesy Red Bull Air Force / produced and
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Measurements of Arctic Sea ice by NASA in 2019 confirms that it is still trending downwards. The maximum extent of the ice did not break the record this year unlike the last 4 years but “it continued a trend of declining sea ice maximums and minimums,” ac
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At the 115th Explorers Club Dinner in New York City, NASA astronaut jokingly talked about not being lonely while Neil Armstrong and Buzz Aldrin were on the moon. He also expressed concern about the mice that accompanied them in quarantine after the missio
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NASA's OSIRIS-REx mission has captured close-up views of Asteroid Bennu. -- Water on Asteroid Bennu Could Mean 'Pay Dirt' for Space Miners: https://www.space.com/asteroid-bennu-water-space-mining-osiris-rex.htmlCredit: NASA/GSFC
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NASA administrator Jim Bridenstine talks with Elon Musk about SpaceX's Crew Dragon. The conversation occurred on the Crew Access Arm of launch complex 39A at Kennedy Space Center in Florida. Watch Crew Dragon launch: https://www.space.com/spacex-launches-