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Outer Space & Universe

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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)

 

  • 03:30 See 4 stunning cosmic views from the James Webb Space Telescope and Chandra X-ray Observatory

    See 4 stunning cosmic views from the James Webb Space Telescope and Chandra X-ray Observatory

    by Shubnigg Added 105 Views / 0 Likes

    Visit Rho Ophiuchi, the Orion Nebula, spiral galaxy NGC 3627 and galaxy cluster MACS J0416 in these composite views from the James Webb Space Telescope and Chanda X-ray Observatory. Credit: NASA/CXC/A. Hobart

  • 01:05 NASA's Artemis 2 moon rocket's core stage exits assembly facility

    NASA's Artemis 2 moon rocket's core stage exits assembly facility

    by Shubnigg Added 105 Views / 0 Likes

    The core stage for NASA’s Space Launch System (SLS) rocket, which is slated to launch astronauts around the moon for the first time since the Apollo era, was rolled out of the space agency’s Michoud Assembly Facility, in New Orleans, and transported to NA

  • 10:01 RED ALERT! Hurricane Double Hit USA & Double Hurricane Watch!

    RED ALERT! Hurricane Double Hit USA & Double Hurricane Watch!

    by Shubnigg Added 105 Views / 0 Likes

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  • 03:14 Space to Ground: Delivery: Aug. 09, 2024

    Space to Ground: Delivery: Aug. 09, 2024

    by Shubnigg Added 105 Views / 0 Likes

    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

  • 05:13 SpaceX deploys Polaris Dawn's Dragon spacecraft in amazing view from space

    SpaceX deploys Polaris Dawn's Dragon spacecraft in amazing view from space

    by Added 105 Views / 0 Likes

    The SpaceX Dragon spacecraft carrying Polaris Dawn crew separated from the Falcon 2nd stage about 12 minutes after liftoff on Sept. 10, 2024. A view of the nose cone opening is seen as well. Full Story: https://www.space.com/spacex-polaris-dawn-astronaut-

  • 10:53 Boom! SpaceX Starship successfully re-enters atmosphere, splashes down and explodes

    Boom! SpaceX Starship successfully re-enters atmosphere, splashes down and explodes

    by Added 105 Views / 0 Likes

    The 5th test flight of Starship was a success! Watch the last few minutes of Earth re-entry and splashdown in the Indian Ocean. A SpaceX buoy captured the ship explode after splashdown. Credit: SpaceX

  • 01:19 Space debris burns up over US, likely reentering Starlink satellite

    Space debris burns up over US, likely reentering Starlink satellite

    by Added 105 Views / 0 Likes

    The American Meteor Society received several reports of a fireball over Kansas, Texas and Oklahoma on Oct. 9, 2024 (Oct. 10 - EST) . Views from Frisco, Texas and Burlington, Kansas are seen here. It appears to be "Starlink-4682" which was "launched in 202

  • 00:30 Pan Video: NGC 2090

    Pan Video: NGC 2090

    by Added 105 Views / 0 Likes

    Featured in this NASA/ESA/CSA James Webb Space Telescope Picture of the Month is the spiral galaxy NGC 2090, located in the constellation Columba. This combination of data from Webb’s MIRI and NIRCam instruments shows the galaxy’s two winding spiral arms

  • 00:20 heic2302a

    heic2302a

    by Shubnigg Added 104 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/heic2302a/Credit:NASA & ESA

  • 06:51 Wild, wild December 2023 has begun.

    Wild, wild December 2023 has begun.

    by Shubnigg Added 104 Views / 0 Likes

    Stay cool & be awesome.Pray for peace & help prevent world war 3.Merry Christmas & Happy Holidays.God bless everyone,T

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    by Shubnigg Added 104 Views / 0 Likes

  • 00:30 Pan of UGC 5829

    Pan of UGC 5829

    by Shubnigg Added 104 Views / 0 Likes

    This gauzy-looking celestial body is UGC 5829, an irregular galaxy that lies about 30 million light-years away. Despite there not being many observations of this relatively faint galaxy, it has the distinction of having a descriptive soubriquet: the Spide

  • 00:37 Watch India's reusable launch vehicle's runaway landing in test

    Watch India's reusable launch vehicle's runaway landing in test

    by Shubnigg Added 104 Views / 0 Likes

    The Indian space agency's RLV-LEX-02 landing experiment was successfully conducted on March 22, 2024 at the Aeronautical Test Range (ATR) in Karnataka. Credit: ISRO

  • 01:05 China successfully tests Earth-moon communications with new satellite pic, says CCTV

    China successfully tests Earth-moon communications with new satellite pic, says CCTV

    by Shubnigg Added 104 Views / 0 Likes

    According to China Central Television, the Tiandu-1, Tiandu-2 and Queqiao-2 satellites have successfully tested communications from moon orbit to Earth. Credit: Space.com | footage courtesy: China Central Television (CCTV) | edited by [Steve Spaleta](http

  • 02:32 RED ALERT! VERY Dangerous Weather Today & Tomorrow! Moar X-Class flares! Near Earth Asteroid!

    RED ALERT! VERY Dangerous Weather Today & Tomorrow! Moar X-Class flares! Near Earth Asteroid!

    by Shubnigg Added 104 Views / 0 Likes

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  • 06:51 PINK ALERT! The 1st of 6 Solar Storms has hit! Buckle up for a Wild* Weekend!

    PINK ALERT! The 1st of 6 Solar Storms has hit! Buckle up for a Wild* Weekend!

    by Shubnigg Added 104 Views / 0 Likes

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  • 01:14 More X-flares!! Sunspot that triggered auroras on Earth has its biggest blast yet

    More X-flares!! Sunspot that triggered auroras on Earth has its biggest blast yet

    by Shubnigg Added 104 Views / 0 Likes

    Eruptions from sunspot AR3664 have created a geomagnetic storm that is delivering jaw-dropping northern lights on Earth. On May 11, 2024, the sunspot blasts X5.8- and X1-class solar flares. NASA's Solar Dynamics Observatory captured the fireworks.Credit:

  • 02:39 Milky Way's core is 'venting' - Chandra X-ray Telescope sees it!

    Milky Way's core is 'venting' - Chandra X-ray Telescope sees it!

    by Shubnigg Added 104 Views / 0 Likes

    Astronomers using the Chandra X-ray Telescope have discovered an "exhaust vent attached to a “chimney” of hot gas blowing away from the center of the Milky Way galaxy," according to the Chandra team. Credit: NASA/CXC/A. Hobart

  • 19:22 Artemis II Crew Training Reel

    Artemis II Crew Training Reel

    by Shubnigg Added 104 Views / 0 Likes

    NASA astronauts Reid Wiseman, Victor Glover, Christina Koch and Canadian Space Agency (CSA) astronaut Jeremy Hansen train for their venture around the Moon. Artemis II will be NASA’s first crewed test flight of the Space Launch System rocket and Orion spa

  • 01:00 Very active sunspot unleashes 2 more x-flares! Spacecraft views

    Very active sunspot unleashes 2 more x-flares! Spacecraft views

    by Shubnigg Added 104 Views / 0 Likes

    Sunspot AR3697 (formerly AR3664) unleased a pair of x-flares on May 31 - June 1, 2024. NASA's Solar Dynamics Observatory captured the fireworks. Full Story: https://www.space.com/sun-unleashes-2-x-class-solar-flares-in-less-than-12-hoursThis active region

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