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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01:51
Happy 4th of July from Space! Astronauts Send Greetings
Added 377 Views / 0 LikesNASA astronauts Christina Kock and Nick Hague wish everyone a Happy 4th of July from the International Space Station. Full Story: https://www.space.com/space-station-astronauts-fourth-of-july.htmlredit: NASA
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03:48
Happy Birthday Albert Einstein! NatGeo’s 'Genius' Sent Us
Added 528 Views / 0 LikesHappy Birthday Albert Einstein! NatGeo’s 'Genius' Sent Us
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01:55
Happy Chinese New Year from the Tiangong space station crew
Added 60 Views / 0 LikesThe Shenzhou 17 crew Tang Shengjie, Tang Hongbo and Jiang Xinlin wish everyone a Happy Chinese New Year from the Tiangong space station. Credit: Space.com | footage courtesy: China Central Television (CCTV) | edited by [Steve Spaleta](https://twitter.com/
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12:53
Happy Easter* week! Is there a Sunspots & Saturn & Jupiter & Neptune connection? & other thoughts.
Added 138 Views / 0 LikesThank you for being Awesome, Asteroid Fight Club.I hope you've had a wonderful weekend.God bless everyone,T LEWISON5430 BIRDWOOD RD. #416HOUSTON TEXAS 77096https://www.paypal.me/THORnewshttps://venmo.com/TEric-Lewison$THORnews on CashApphttps://www.patreo
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01:10
Happy Father's Day! SpaceX Demo-2 astronauts talk about sons while on Space Station
Added 331 Views / 0 LikesNASA astronauts Bob Behnken and Doug Hurley talk about their sons excitement over the zero-g indicator dinosaur they named that accompanied the pair to the International Space Station.Credit: NASA
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03:18
Happy Holidays from the Expedition 70 Crew
Added 48 Views / 0 LikesAboard the International Space Station, NASA astronauts Jasmin Moghbeli and Loral O’Hara along with ESA (European Space Agency) astronaut Andreas Mogensen and JAXA (Japan Aerospace Exploration Agency) astronaut Satoshi Furukawa offered their thoughts and
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03:00
Happy Holidays from the Expedition 70 Crew
Added 59 Views / 0 LikesAboard the International Space Station, NASA astronauts Jasmin Moghbeli and Loral O’Hara along with ESA (European Space Agency) astronaut Andreas Mogensen and JAXA (Japan Aerospace Exploration Agency) astronaut Satoshi Furukawa offered their thoughts and
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02:57
Happy Holidays from the International Space Station
Added 45 Views / 0 LikesThe crew of the International Space Station sends down their holiday greetings.
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01:08
Happy Holidays from the International Space Station Crew
Added 726 Views / 0 LikesHappy Holidays from the International Space Station Crew
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02:21
Happy Holidays from the International Space Station!
Added 87 Views / 0 LikesNASA Astronauts Frank Rubio, Nicole Mann, Josh Cassada, and JAXA astronaut Koichi Wakata share some of their favorite holiday traditions from back home, and a few from space.
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02:11
Happy Holidays! Astronauts in space share favorite traditions
Added 102 Views / 0 LikesHoliday season is space? NASA Astronauts Frank Rubio, Nicole Mann, Josh Cassada, and JAXA astronaut Koichi Wakata give their thoughts. Credit: NASA