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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NOAA's GOES-East satellite captured imager of Hurricane Nigel churning over the Atlantic Ocean on Sept. 19-20, 2023. -- See Hurricane Lee's eye lit up by lightning in this amazing footage from plane: https://www.youtube.com/watch?v=Xm4mS7xeuUECredit: Spac
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NASA's Johnson Space Center is hosting an Open House for the public on October 14th! Come join us to see our facilities, meet astronauts, and learn about all things space and human spaceflight! We are also providing our guests with the opportunity to view
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A SpaceX Falcon 9 launched 22 Starlink satellites from Cape Canaveral Space Force Station in Florida on Sept. 20, 2023 at 11:38 p.m. EDT (0338 GMT Sept. 20). [Full Story](https://www.space.com/spacex-starlink-falcon-9-record-17th-launch)The rocket's first
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Sierra Space tested an inflatable habitat prototype fitted with a metallic window sub-structure. "The LIFE habitat will house a minimum of two windows," according to a release from the commercial space company. Credit: Sierra Space
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China's Shenzhou-16 crew have a "garden of vegetables in space. "The plants that grow in the garden are watered in the opposite direction from that on Earth," according to China Central Television.Credit: China Central Television (CCTV)
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Stoke Space Hopper2 prototype conduced its first vertical takeoff and vertical landing (VTVL) on Sept. 17, 2023 in Moses Lake, Washington. Credit: Stoke Space | edited by Space.com's [Steve Spaleta](https://twitter.com/stevespaleta)
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An Electron rocket carrying a synthetic aperture radar (SAR) spacecraft for the California company Capella Space launched from New Zealand on Sept. 19, 2023 at 2:55 a.m. EDT (0655 GMT; 6:55 p.m. local New Zealand time). Full Story: https://www.space.com/r
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NASA astronaut Loral O'Hara, alongside Russian counterparts Oleg Kononenko and Nikolai Chub completed ingress into the International Space Station shortly after docking on Sept. 15, 2023. Full Story: https://www.space.com/soyuz-ms-24-arrives-international
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A batch of Starlink satellites were deployed by SpaceX shortly after launch on Sept. 16, 2023. See multiple views captured by cameras aboard the Falcon 9 rocket second stage. Watch the launch: https://www.space.com/spacex-starlink-launch-group-6-16Credit:
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NASA's Solar Dynamics Observatory captured a huge filament eruption in multiple wavelengths on Sept. 16, 2023. The eruption created a coronal mass ejection that "should hit Earth's magnetic field on Sept. 19th," according to Spaceweather.comCredit: Space.
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A SpaceX Falcon 9 rocket launched 22 Starlink spacecraft from Cape Canaveral Space Force Station in Florida on Friday at 11:38 p.m. EDT (0338 GMT on Sept. 16). Credit: SpaceX
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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 astronaut Loral O'Hara, alongside Russian counterparts Oleg Kononenko and Nikolai Chub docked with the International Space Station about 3 hours after launching aboard their MS-24 Soyuz spacecraft. Credit: NASA
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A vacuum Raptor engine was recently test-fired after being "chilled to mimic conditions after a long coast period in space," according to SpaceX. Previously, a Raptor was tested to demonstrate the descent burn to the moon surface for NASA's Artemis progra
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NASA Astronaut Loral O’Hara launched to the International Space Station for the first time on Sept. 15 the Baikonur Cosmodrome in Kazakhstan. Her launch signifies a lifetime of dedication to exploration for O’Hara, who grew space-flown tomato seeds in the
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NASA astronaut Loral O'Hara, alongside Russian counterparts Oleg Kononenko and Nikolai Chub launched aboard a Soyuz spacecraft to the International Space Station from the Baikonur Cosmodrome in Kazakhstan. on Sept. 15, 2023.Credit: NASA
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NOAA's GOES-East satellite captured footage of Hurricane Lee on Sept. 13-14, 2023. Watch: https://youtu.be/Xm4mS7xeuUECredit: CIRA/NOAA | edited by Space.com's Steve Spaleta (https://twitter.com/stevespaleta)