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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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  • 01:09 New Remember fidget spinners? See one spin in space!

    Remember fidget spinners? See one spin in space!

    by admin Added 13 Views / 0 Likes

    NASA brought a fidget spinner to the International Space Station a few years ago. See it in action here. Credit: NASA/Johnson Space Center

  • 04:27 New SpaceX Starship chosen by NASA to land astronauts on Moon

    SpaceX Starship chosen by NASA to land astronauts on Moon

    by admin Added 13 Views / 0 Likes

    NASA's Human Landing System program has picked SpaceX to develop the lander for Artemis. [Full Story](https://www.space.com/spacex-wins-nasa-artemis-moon-lander-contest)Credit: NASA

  • 01:37 New Mars helicopter's flight date set after delay - See its blades spin!

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    by admin Added 16 Views / 0 Likes

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    by admin Added 20 Views / 0 Likes

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  • 03:22 New Mars helicopter test flight status updated by NASA

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    by admin Added 18 Views / 0 Likes

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  • 02:41 New Know Your Crew...Two!

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  • 04:52 New SpaceX Crew-2 astronauts arrive in Florida ahead of launch

    SpaceX Crew-2 astronauts arrive in Florida ahead of launch

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    NASA's Shane Kimbrough and Megan McArthur, JAXA astronaut Akihiko Hoshide and ESA's Thomas Pesquet landed at NASA's Kennedy Space Center in Florida on April 16, 2021 ahead of their April 22 SpaceX Crew Dragon launch attempt. -- Meet Crew-2: The 4 space-bo

  • 17:09 New Space Chat! Mars Helicopter Ingenuity Takes Center Stage

    Space Chat! Mars Helicopter Ingenuity Takes Center Stage

    by admin Added 19 Views / 0 Likes

    Today at 2:00p ET (11a PT/1800 GMT), Space.com senior writer Chelsea Gohd will be taking a deep dive into Mars helicopter Ingenuity, which is expected to lift off the the Martian ground sometime next week!

  • 01:05 New China launches experimental Shiyan 6 satellites - See it in slo-mo

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    by admin Added 19 Views / 0 Likes

    A Long March-4B rocket launched a set of experimental Shiyan 6 satellites from the Taiyuan Satellite Launch Center in China on April 8, 2021. The satellites will be "used to carry out space environment survey and experiments on related technologies," acco

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    Know Your Crew...Two!

    by admin Added 19 Views / 0 Likes

    Shane Kimbrough, Megan McArthur, Aki Hoshide, and Thomas Pesquet are about to fly NASA’s SpaceX Crew-2 mission to the International Space Station. Before their launch, we brought them in the studio to test what they know about each other – and what they t

  • 08:46 New Mars helicopter delay, Blue Origin launches and more in VFS Weekly

    Mars helicopter delay, Blue Origin launches and more in VFS Weekly

    by admin Added 19 Views / 0 Likes

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  • 02:43 New Space to Ground: Signing Out: 04/16/2021

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    by admin Added 19 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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    Tsunami. Eris Energy & Nor'easter? 4 SUNSPOTS? Florida & Southeast storms & more Volcano activity.

    by admin Added 22 Views / 0 Likes

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  • 01:15 New See asteroid named after Jackie Robinson orbit the sun in 5-year time-lapse animation

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    by admin Added 22 Views / 0 Likes

    4319 Jackierobinson was named after the 1st African American to play in the modern era of Major League Baseball. The asteroid, originally designated 1981 ER14, was discovered on Mar. 1, 1981 by "S. J. Bus at Siding Spring in the course of the U.K. Schmidt

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    Light from a binary black hole system is bent and distorted as they pass in front of each other in this simulation from NASA.Credit: NASA’s Goddard Space Flight Center/Jeremy Schnittman and Brian P. PowellMusic: "Gravitational Field" from Orbit. Written a

  • 04:20 New STEMonstrations: Newton's First Law of Motion

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    by admin Added 21 Views / 0 Likes

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  • 06:00 New Spacewalks in HD 2020-2021

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    by admin Added 22 Views / 0 Likes

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  • 01:30 New See the famous M87 black hole in multiple wavelengths

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    by admin Added 17 Views / 0 Likes

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