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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)

 

  • The 2024 Humans to Mars Summit | an ExploreMars.Org Event - Day 1

    The 2024 Humans to Mars Summit | an ExploreMars.Org Event - Day 1

    by Shubnigg Added 101 Views / 0 Likes

    8:30-8:40 am ET | Welcome and IntroductionsChris Carberry (Explore Mars, Inc. | CEO)J.R. Edwards (Explore Mars, Inc. | President)8:40-9:00 am ET | Innovating Our Way to the Moon and MarsDr. Prasun Desai (NASA | Deputy Assoc Administrator, STMD)9:00 -9:30

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    Blastoff! SpaceX launches Starlink batch on booster's record-breaking 21st flight, nails landing

    by Shubnigg Added 101 Views / 0 Likes

    A SpaceX Falcon 9 rocket launched 23 Starlink Satellites from Florida's Cape Canaveral Space Force Station on May 18, 2024 at 8:32 p.m. EDT (0032 GMT on May 18).According to Space.com, the Falcon 9's first stage came back to Earth about 8.5 minutes after

  • 01:17 See zebrafish swim in space on China's Tiangong space station

    See zebrafish swim in space on China's Tiangong space station

    by Shubnigg Added 101 Views / 0 Likes

    China is studying zebrafish aboard the Tiangong space station and they are doing just fine. Full Story: https://www.space.com/china-tiangong-space-station-zebrafish-healthyCredit: China Central Television (CCTV)

  • 02:16 'Cat scratch' trenches of Mars' Nili Fossae! Flyover created from orbiter imagery

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    by Shubnigg Added 101 Views / 0 Likes

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    Blastoff! SpaceX launches 23 Starlink satellites - 14th mission of May 2024!

    by Shubnigg Added 101 Views / 0 Likes

    A SpaceX Falcon 9 rocket iaunched 23 Starlink from Cape Canaveral Space Force Station on May 31, 2024. It was the 14th launch for the private spaceflight company in May 2024. Credit: SpaceX

  • 03:20 Space to Ground: Calypso Arrives: June 07, 2024

    Space to Ground: Calypso Arrives: June 07, 2024

    by Shubnigg Added 101 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

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    by Shubnigg Added 101 Views / 0 Likes

    SpaceX deployed NOAA's GOES-U launch a few hours after its Falcon Heavy launch on June 25, 2024. Watch the launch: https://www.space.com/spacex-falcon-heavy-goes-u-weather-satellite-launchCredit: NASA

  • 00:30 Pan: Omega Centauri

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    by Shubnigg Added 101 Views / 0 Likes

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    Starliner astronauts to fly SpaceX home #space #shorts

    by Shubnigg Added 101 Views / 0 Likes

    NASA chief Bill Nelson states that Boeing Starliner astronauts Butch Wilmore and Suni Williams will return to Earth on a SpaceX Dragon. Credit: NASA

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    Blastoff! SpaceX launches 22 Starlink satellites from Florida, nails landing

    by Shubnigg Added 101 Views / 0 Likes

    A SpaceX Falcon 9 rocket launched 22 Starlink satellites from Space Launch Complex 40 (SLC-40) at Cape Canaveral Space Force Station in Florida on Aug. 20, 2024 at 9:20 a.m. ET. Credit: SpaceX

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    by Shubnigg Added 101 Views / 0 Likes

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    SpaceX Polaris Dawn spacewalk! See the first-ever private egress from crew

    by Added 101 Views / 0 Likes

    SpaceX's Polaris Dawn mission conducted the first-ever private spacewalk on Sept. 12, 2024. Full Story: https://www.space.com/spacex-polaris-dawn-first-private-spacewalkDuring the spacewalk (also known as an extravehicular activity, or EVA), Polaris Dawn

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    by Added 101 Views / 0 Likes

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    by Added 101 Views / 0 Likes

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    China's new space cargo shuttle launches to Tiangong space station in animation

    by Added 101 Views / 0 Likes

    China's new Haolong space cargo shuttle will be "unveiled at the upcoming 15th China Air Show,” according to China Central Television. See it launch in this animation. Credit: Space.com | footage courtesy: China Central Television (CCTV) | edited by Steve

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    Blastoff! SpaceX launches secret US spy satellite, nails landing in Florida

    by Added 101 Views / 0 Likes

    A SpaceX Falcon 9 rocket launched the NROL-69 mission for the National Reconnaissance Office (NRO) from Florida's Cape Canaveral Space Force Station on March 24, 2025 at 1:48 p.m. EDT (1748 GMT). [Full Story](https://www.space.com/space-exploration/launch

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    Gateway Lunar Space Station Module Will Journey to US

    by Added 101 Views / 0 Likes

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    by shub Added 100 Views / 0 Likes

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  • 04:21 WHAT.

    WHAT.

    by Shubnigg Added 100 Views / 0 Likes

    2023.Merry Christmas. Happy new year.Mars & Mercury retrograde,this moment reflection.God bless everyone.Life is good.yay, asteroid fight clublove,T LEWISON

  • 01:01 Ride the Wave after Wave after Wave.

    Ride the Wave after Wave after Wave.

    by Shubnigg Added 100 Views / 0 Likes

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