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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SpaceX has tested their Crew Dragon parachutes over 25 times with the help of a high-altitude balloon, a C-130 airplane and a skycrane helicopter. -- Parachute Development a Challenge for Commercial Crew: https://www.space.com/parachute-challenge-for-comm
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SpaceX is returning human spaceflight capabilities to the United States with one of the safest, most advanced systems ever built.
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NASA's Hubble Space Telescope was used to study the moon in 2005. What they learned from the observations will help in future human exploration. -- How NASA Tracked Apollo 11 to the Moon and Back with 1960s Tech: https://www.space.com/how-nasa-tracked-apo
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Mission training for astronauts reflects the missions themselves: rigorous. In the Apollo era, astronauts and engineers prepared for the unknown as much as possible, but knew how to improvise in unprecedented situations. Currently, we’ve set our sights on
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Description: Before launching to the International Space Station on the anniversary of Neil Armstrong’s “giant leap for mankind,” astronaut Drew Morgan was making his own giant leaps out of airplanes as part of his training. jsc2019m000608 AstronautMoment
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Footage of lab testing of moon rocks and soil samples collected by NASA Apollo astronauts has been recently rediscovered. Credit: NASA/Ames Research Center
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President John Kennedy’s challenge to land men on the Moon and return them safely to Earth in the 1960s was meant to encourage the United States to do what was hard, and to achieve what was considered by many to be impossible. But the effect of that chall
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5000 model rockets were launched at the US Space & Rocket Center RV Park in Huntsville, Alabama on July 16, 2019 to coincide with the 50th anniversary of the Saturn V rocket liftoff carrying the Apollo 11 mission to the Moon. Credit: Boeing / Aerojet Rock
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NASA Apollo 11 Firing Room Instrumentation Controller, Joann Morgan, talks about the historic liftoff. -- Relive the Apollo 11 Moon Landing Mission in Real Time!: https://www.space.com/relive-apollo-moon-landing-real-time.htmlCredit: NASA
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NASA's Apollo 11 command module pilot Michael Collins talks about the Saturn V rocket launching him towards the moon on July 16, 2019. -- Follow the Apollo Mission in Realtime, with mission audio and video: https://www.space.com/relive-apollo-moon-landing
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Watch video from the NASA archives of the July 16, 1969 Apollo 11 launch. Credit: NASA
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NASA astronaut Christina Koch recently shared a star trail image captured from the International Space Station that consists of several stacked stacked, see it here: https://twitter.com/Astro_Christina/status/1149059748643258368. The same set of images ti
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A Hubble Space Telescope observation of active galaxy NGC 3147 has revealed that the supermassive black hole at its core has a peculiar disk surrounding it. Surprise! This Monster Black Hole's Disk Shouldn't Exist: https://www.space.com/black-hole-disk-sh