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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A Russian Soyuz-2.1b rocket was struck by lightning during launch on May 27, 2019. The mission was a success despite the strike, the GLONASS-M satellite the rocket was carrying reached orbit.Credit: Roscosmos/Ministry of Defense of the Russian Federation/
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SpaceX explains how the Starlink satellites will maneuver on-orbit and what will become of them at the end of their life-cycles. Credit: SpaceX
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Less than 24 hours after SpaceX's launch of the first 60 Starlink satellites, amateur astronomer Dr. Marco Langbroek (sattrackcam.blogspot.com) captured them streaking over the Netherlands. -- Elon Musk: 'So Far, So Good' for Starlink Sats: https://www.sp
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SpaceX deployed the first 60 Starlink satellites on May 24, 2019. -- Just the Beginning for Starlink Megaconstellation: Projecthttps://www.space.com/spacex-starlink-satellites-launch-just-beginning.html 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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SpaceX is targeting Thursday, May 23 for the launch of 60 Starlink satellites from Space Launch Complex 40 (SLC-40) at Cape Canaveral Air Force Station, Florida. SpaceX’s Starlink is a next-generation satellite network capable of connecting the globe, esp
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DescriptionA SpaceX Falcon 9 first stage landed on the “Of Course I Still Love You” drone ship in the Atlantic Ocean after launching the first 60 satellites of the Starlink megaconstellation. Credit: SpaceX
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The first 60 satellites of SpaceX’s Starlink megaconstellation were launched atop a Falcon 9 rocket on May 23, 2019. Credit: SpaceX
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NASA administrator Jim Bridenstine explains how the Artemis mission to the moon could work and announces that the space agency has selected the company Maxar to develop the power and propulsion element (PPE) for the Lunar Gateway. -- NASA Names New Moon L
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Blue Origin founder Jeff Bezos unveiled the 'Blue Moon' Lunar Lander on May 9, 2019. -- Here is how the lander works: https://www.space.com/blue-origin-blue-moon-lander-explained.htmlCredit: Blue Origin
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ISRO launched the PSLV-C46 / RISAT-2B mission on May 21, 2019 EDT - 5:30 am local time May 22. The rocket was carrying a radar imaging Earth observation satellite. -- Full Story: https://www.space.com/india-risat-2b-earth-satellite-launch-success.htmlCred
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Fly 30 million light-years through the constellation of Canes Venatici to see amazing Hubble Space Telescope imagery of irregular galaxy NGC 4485. It's unusual shape is due to the gravitational pull of neighboring galaxy NGC 4490. -- See Hubble's closeup
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