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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)

 

  • 00:30 Pan: UGC 10043

    Pan: UGC 10043

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    What kind of astronomical object is this? It doesn’t look quite like the kinds of galaxies, nebulae, star clusters or galaxy clusters which Hubble normally brings us images of. In fact, this is a spiral galaxy, named UGC 10043 — we just happen to be seein

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

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    A SpaceX Falcon 9 rocket launched 22 Starlink satellites from Space Launch Complex 4 East (SLC-4E) at Vandenberg Space Force Base in California on Dec. 13, 2024. Full Story: https://www.space.com/space-exploration/launches-spacecraft/spacex-launching-22-s

  • 02:06 Spiral galaxy NGC 2566 in stunning JWST and Hubble views - See in 4K

    Spiral galaxy NGC 2566 in stunning JWST and Hubble views - See in 4K

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    The James Webb Space Telescope and Hubble Space Telescope have captured amazing views of spiral galaxy NGC 2566. Credit: Space.com | ESA, NASA & CSA / Hubble /Webb, A. Leroy, N. Bartmann (ESA/Webb), D. Thilker | edited by Steve Spaleta (https://www.instag

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    A SpaceX Falcon 9 rocket launched 30 Bandwagon-2 rideshare mission, satellites from California's Vandenberg Space Force Base on Dec. 21, 2024 at 6:34 a.m. EDT (1134 GMT; 3:34 a.m. local California time). Bandwagon-2 included payloads for South Korea's Age

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    Tis the Season.God bless everyone,Thttps://www.paypal.me/THORnewshttps://venmo.com/TEric-Lewisonhttps://www.patreon.com/thornews

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    Brilliant fireball lights up skies over Indiana

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    Blastoff! Rocket Lab launches Strix radar-imaging satellites from New Zealand

    by Added 45 Views / 0 Likes

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    NASA ejects Orion spacecraft's forward bay cover in test - Slow motion view

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    NASA tested the Orion spacecraft forward bay cover's ejection mechanism at the Neil Armstrong Test Facility in Sandusky, Ohio. Credit: NASA/Jordan Salkin and Quentin Schwinn | edited by Space.com

  • 02:18 SpaceX Starship single engine test fire simulates flight 7 in-space burn

    SpaceX Starship single engine test fire simulates flight 7 in-space burn

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  • 00:45 potm2409a

    potm2409a

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    The open cluster Westerlund 1, showcased in this new Webb Picture of the Month, is located roughly 12 000 light-years away in the southern constellation Ara (the Altar) where it resides behind a huge interstellar cloud of gas and dust. It was discovered i

  • 00:30 Pan: NGC 1672

    Pan: NGC 1672

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    This Hubble Picture of the week features NGC 1672, a barred spiral galaxy located 49 million light-years from Earth in the constellation Dorado. This galaxy is a multi-talented light show, showing off an impressive array of different celestial lights. Lik

  • 02:38 U.S. Spacewalk 91 Animation - Friday, January 10, 2025

    U.S. Spacewalk 91 Animation - Friday, January 10, 2025

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    by Added 44 Views / 0 Likes

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    thank you for being amazing.God bless everyone,Thttps://www.paypal.me/THORnewshttps://venmo.com/TEric-Lewisonhttps://www.patreon.com/thornews

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    Martian New Year tracked by NASA - Avalanches, exploding jets and more!

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    New Years day on Mars occurs in November. NASA explains the spring time changes on the Red Planet. Credit: NASA/JPL-Caltech

  • 02:03 Starship | Sixth Flight Test

    Starship | Sixth Flight Test

    by shub Added 44 Views / 0 Likes

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    Space to Ground: Spacewalk 273: Jan. 17, 2025

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    Pan of galaxy cluster MACS J1423 (NIRCam image)

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  • 01:24 Binary star system surprisingly found near monster black hole

    Binary star system surprisingly found near monster black hole

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    A pair of stars orbiting one another has been found near the supermassive black hole Sagittarius A* using the European Southern Observatory’s Very Large Telescope (ESO’s VLT). Full Story: https://www.space.com/first-binary-stars-sgrA-black-holeCredit; ESO

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