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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01:26
NASA Updates Near-Earth Asteroid Count | Planetary Defense: By the Numbers - June 2022
Added 98 Views / 0 Likes☄️ What do we know about the asteroids and comets in Earth's neighborhood? Planetary defense — which includes finding, tracking, & characterizing these near-Earth objects — is part of our mission. Here's what we've found so far.Want more? Learn more about
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00:33
NASA Updates Near-Earth Asteroid Count | Planetary Defense: By the Numbers - June 2022
Added 112 Views / 0 LikesPlanetary defense includes finding, tracking, & characterizing near-Earth objects. Here's what we've found so far. #shorts
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00:33
NASA Updates Near-Earth Asteroid Count | Planetary Defense: By the Numbers - November 2022
Added 89 Views / 0 LikesPlanetary defense includes finding, tracking, & characterizing near-Earth objects. Here's what we've found so far. #shorts
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10:20
NASA upgrading spacesuit tech for moon and Mars
Added 126 Views / 0 LikesNASA's is studying new thermal system technology with the Spacesuit Evaporation Rejection Flight Experiment (SERFE) on the International Space Station and Earth. Credit: NASA Johnson Space Center
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02:49
NASA uses laser to measure Earth's 'ice loss'
Added 330 Views / 0 LikesNASA’s Ice, Cloud and land Elevation Satellite 2 (ICESat-2) has used its laser instrument to make "precise, detailed measurements of how the elevation of the Greenland and Antarctic ice sheets have changed over 16 years," according to the space agency's G
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03:07
NASA Using the Moon to Understand the Sun: ARTEMIS Extended Mission | Video
Added 683 Views / 0 LikesAs the Moon passes through Earth's magnetic field, two lunar-orbiting spacecraft look for turbulence, particle acceleration, and magnetic reconnection. These phenomena control how the solar wind interacts with Earth's magnetosphere.
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03:19
NASA Video File : Expedition 44 Crew Undergoes Final Training Outside Moscow
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00:50
NASA Village signatures fly with me on the International Space Station.
Added 496 Views / 0 LikesNASA Village signatures fly with me on the International Space Station.
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00:42
NASA VIPER moon rover prototype rolls down ramp in tests on Earth
Added 66 Views / 0 LikesWatch a prototype of NASA's Volatiles Investigating Polar Exploration Rover, (VIPER) roll down a ramp to simulate its deployment on the lunar surface. Credit: NASA
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02:45
NASA VIPER moon rover's landing site - Take a tour
Added 144 Views / 0 LikesThe Volatiles Investigating Polar Exploration Rover (VIPER) "will land near the western edge of the Nobile Crater at the Moon’s South Pole," according to the NASA Ames Research Center. Take a tour of the region. -- NASA unveils landing site on the moon fo
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02:09
NASA VIPER rover tested on simulated moon-like terrain on Earth
Added 110 Views / 0 LikesWatch a VIPER test unit take on simulated moon terrain in tests at NASA's Glenn Research Center in Cleveland.Credit: NASA
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03:35
NASA Vision for Venus: HAVOC Airships | Video
Added 551 Views / 0 LikesNASA Vision for Venus: HAVOC Airships | Video
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04:19
NASA wants to build a Hotel on the Moon!!!
Added 633 Views / 0 LikesNASA wants to build a Hotel on the Moon!!!
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04:26
NASA wants to give the Moon a Moon. LOL wut?
Added 584 Views / 0 LikesNASA wants to give the Moon a Moon. LOL wut?
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07:53
NASA Warns Not To Touch Antares Rocket Debris, Contact Authorities | Video
Added 808 Views / 0 LikesNASA Warns Not To Touch Antares Rocket Debris, Contact Authorities | Video
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03:27
NASA witnesses Something Emerge from a Black Hole
Added 638 Views / 0 LikesNASA witnesses Something Emerge from a Black Hole
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02:42
NASA ‘Building Coalition of Nations’ to Get to Moon by 2024
Added 334 Views / 0 LikesNASA new directive to get to the Moon by 2024 certainly needs international partnerships to become reality. Representatives from NASA, JAXA, ESA and DLR speak on it importance. Credit: NASA
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02:08
NASA ‘Flying Saucer’ Aerobrakes From Supersonic Speed| Video
Added 631 Views / 0 LikesNASA ‘Flying Saucer’ Aerobrakes From Supersonic Speed| Video
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06:01
NASA's 'Flying Saucer' Parachute Shreds Again During Test Flight | Video
Added 685 Views / 0 LikesNASA's 'Flying Saucer' Parachute Shreds Again During Test Flight | Video
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00:59
NASA's 'Flying Saucer' Test - Heat Shield Inflates and Parachute Fails | Video
Added 775 Views / 0 LikesNASA's 'Flying Saucer' Test - Heat Shield Inflates and Parachute Fails | Video