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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See how the Sample Transfer Arm for the Mars Sample Return mission will work in this animation. Credit: ESA/NASA
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NASA's Europa Clipper mission will carry an original poem written by U.S. Poet Laureate Ada Limón. Credit: NASA/JPL-Caltech
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Views of a massive galaxy cluster Abell 2256 have been captured by NASA’s Chandra X-ray Observatory, ESA’s XMM-Newton and three radio telescopes (LOFAR, the GMRT and the VLA). See a composite of all the views here. Credit: NASA/CXC/A. Hobart
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Gianluca Masi from the Virtual Telescope Project captured imagery of comet C/2022 E3 (ZTF) on Jan. 29. 2023. The comet's closest approach to Earth will be on Feb. 2, 2023 at 26.4 million miles (42.5 million km) away.Credit: Gianluca Masi / Virtual Telesco
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NASA Expedition 68 Flight Engineer Nicole Mann answers student questions from the Boys and Girls Club of the Flathead Reservation and Lake County in Montana. Topics include, water behavior, hair washing, ball throwing, cord management and more. Credit: NA
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NASA successfully test-fired a full-scale Rotating Detonation Rocket Engine (RDRE). It generates thrust by “using a supersonic combustion phenomenon known as a detonation,” according to the space agency's Marshall Space Flight Center, where the test was c
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A 1550 square km (963 sq mi.) iceberg, designated A81, recently broke off Antarctica’s Brunt Ice Shelf. A time-lapse of the 'calving process' was captured by satellites, according to ESA. Full Story: https://www.space.com/iceberg-size-of-london-breaks-off
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For over 20 years, the International Space Station has conducted research in microgravity to develop technologies, unlock biological phenomena, and more! In 2022 the station’s unique laboratory enabled measurements of the Earth’s surface temperature, pave
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Space.com editor-in-chief was in attendance at NASA's Wallops Flight Center for the first launch of a Rocket Lab Electron rocket from US soil on Jan. 24, 2023. Full Story: https://www.space.com/rocket-lab-1st-us-electron-launchCredit: Space.com / Tariq Ma
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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 #AskNASA to talk to us.Learn more about the important research being operated on Station:https://www.nasa.gov/iss-scien
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NASA honors the crews of Challenger, Columbia, Apollo 1, astronauts who died in training and on a test flight. Apollo 1: Astronauts Virgil "Gus" Grissom, Edward White and Roger ChaffeeChallenger: Commander Scobee, Pilot Michael J. Smith, Mission Specialis
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More information and download options: http://esahubble.org/videos/potw2304a/Credit:ESA/Hubble & NASA, J. Bally, M. Robberto Music: Stellardrone - Billions and Billions