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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Take a look at the new Tesla Cybertruck. The stainless steel used to make the truck is also used to manufacture SpaceX’s Starship. -- Tesla's New 'Cybertruck' Has a Bit of SpaceX's Starship for Mars in Its Bones: https://www.space.com/tesla-cybertruck-sta
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NASA astronaut Andrew Morgan jettisoned the Alpha Magnetic Spectrometer's (AMS) debris shield away from the International Space Station on a recent spacewalk. -- AMS Under Repair: https://www.space.com/space-station-ams-repair-first-spacewalk-exp61.htmlCr
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University of Ohio professor William Romoser suggests there could be "insect and reptile-like" life on Mars after studying photos captured by rovers. Story: It's Still Not Aliens: 'Mars Bug' Claim Could Damage the Search for Life: https://www.space.com/ma
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SpaceX recently successfully test fired their Crew Dragon spacecraft abort engines. Story: SpaceX's Crew Dragon Abort System Aces Ground Test Ahead of Major Launch: https://www.space.com/spacex-crew-dragon-abort-static-fire-test.htmlCredit: SpaceX
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During a test on Nov. 20, 2019, SpaceX's Starship Mk1 prototype suffered an anomaly. Credit: Spadre.com South Padre Island Information: https://www.youtube.com/watch?v=jy7bjxXpJdc
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NASA's Kepler Space Telescope was used to discover many multi-planet systems in the Milky Way Galaxy during its mission. This animations shows all of the systems found "as of Oct. 30, 2018," according to the space agency's Goddard Space Flight Center. --
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New observations from the NASA/ESA Hubble Space Telescope have investigated the nature of the powerful gamma-ray burst GRB 190114C by studying its environment.Hubble’s observations suggest that this particular burst displayed such powerful emission becaus
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As we celebrate the space station 20th anniversary, NASA astronaut Don Pettit explains how his perception of the Earth changed during his time aboard the space station.
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See the Apollo 12 landing site as seen from NASA's Lunar Reconnaissance Orbiter (LRO). A 3D visualization was created from images snapped by the spacecraft. [NASA's Apollo 12 Was Struck By Lightning Right After Launch ... Twice!: https://www.space.com/apo
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SpaceX, Blue Origin, Ceres Robotics, Sierra Nevada Corporation, and Tyvak Nano-Satellite Systems Inc. will be able to bid on lunar payload deliveries. -- NASA's Artemis Program - Learn More: https://www.space.com/artemis-program.htmlCredit: NASA
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Using the Keck Observatory in Hawaii, researchers "have obtained the first direct detection of water vapor on Jupiter’s moon, Europa," according to NASA's Goddard Space Flight Center. -- Europa: Facts About Jupiter's Icy Moon and Its Ocean: https://www.sp
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China launched a pair of communications satellites, called KL-α-A and KL-α-B, atop a Kuaizhou-1A rocket on Nov. 17, 2019 from the Jiuquan Satellite Launch Center in northwest China. -- Rundown of Recent Chinese Rocket Launches: https://www.space.com/china
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