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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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    James Webb Space Telescope's stunning view of the Crab Nebula - See in 4K

    by Shubnigg Added 111 Views / 0 Likes

    The James Webb Space Telescope's NIRCam (Near-Infrared Camera) and MIRI (Mid-Infrared Instrument) captured an amazing view of the Crab Nebula. Credit: NASA, ESA, CSA, STScI, T. Temim (Princeton University) | edited by Space.com's [Steve Spaleta](https://t

  • 02:22 Space Force Guardians Discuss the Future of USSF

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    by Shubnigg Added 111 Views / 0 Likes

    In this exclusive conversation between two Space Force Guardians, Spc-3 Amilya Talbot and Spc-3 Ana Chavez discuss the purpose behind the U.S. Space Force and where it's headed. Explore the dynamic nature of the USSF, where operational roles merge seamles

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    RED ALERT! Huge New Mexico Wildfire! 3 Tropical Areas to Watch! New Vegas Monolith Dropped!

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  • 02:31 U.S. Space Force Mission and Focus Explained by Guardians

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    by Shubnigg Added 111 Views / 0 Likes

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  • 01:11 China's Shenzhou-18 crew conducts 2nd spacewalk - See amazing views!

    China's Shenzhou-18 crew conducts 2nd spacewalk - See amazing views!

    by Shubnigg Added 111 Views / 0 Likes

    Chinese astronauts Ye Guangfu and Li Cong conducted a spacewalk outside the Tiangong space station on July 3, 2024. Astronaut Li Guangsu assisted from onboard. "The main purpose of the spacewalk this time is to install protection devices for extravehicula

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    Closest massive black hole to Earth may be in Omega Centauri, Hubble finds

    by Shubnigg Added 111 Views / 0 Likes

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    Boeing Starliner undocks from space station without crew for return to Earth

    by Added 111 Views / 0 Likes

    The Boeing Starliner undocked from the International Space Station on Sept. 6, 2024 at 6:04 p.m. EDT (2204 GMT). The spacecraft is scheduled to touchdown at White Sands Space Harbor in New Mexico on Saturday (Sept. 7) at 12:03 a.m. EDT (0403 GMT or 10:03

  • 01:10 Watch Tropical Storm Francine form over the Gulf of Mexico in time-lapse from space

    Watch Tropical Storm Francine form over the Gulf of Mexico in time-lapse from space

    by Added 111 Views / 0 Likes

    NOAA's GOES-East satellite has captured footage of Tropical Storm Francine's formation over the Gulf of Mexico in this time-lapse that span from Sept. 8-9, 2024. Credit: Space.com | CIRA/NOAA | edited by Steve Spaleta (https://x.com/stevespaleta)Music: Fa

  • 01:09 Polaris Dawn Mission

    Polaris Dawn Mission

    by shub Added 111 Views / 0 Likes

    A live webcast of the Polaris Dawn EVA will begin about one hour prior to the beginning of the spacewalk on Thursday, September 12, which you can watch on X @SpaceX. You can also watch the webcast on the new X TV app. The four-hour window opens at 3:23 a.

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    China’s Long March 2C launches two 4D high-resolution satellites, rocket sheds tiles

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    China's Long March 2c rocket launched the Siwei Gaojing-2 03 and Siwei Gaojing-2 04 satellites from the Jiuquan Satellite Launch Center on Nov. 25, 2024. Credit: Space.com | footage courtesy: China Central Television (CCTV) | edited by [Steve Spaleta](htt

  • 02:56 Views of Starship Flight 6 from International Space Station

    Views of Starship Flight 6 from International Space Station

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    While orbiting approximately 250 miles above Earth, external cameras aboard the International Space Station captured the sixth test flight of SpaceX’s Starship after liftoff at 4 p.m. CST on Tuesday, Nov. 19. For Artemis III, the first crewed return to th

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    by Added 111 Views / 0 Likes

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  • USSF-67 Mission Control Audio

    USSF-67 Mission Control Audio

    by shub Added 110 Views / 0 Likes

    This is the vehicle trajectory and mission control audio without any additional commentary. There may be very long periods of silence. For our full hosted webcast, visit https://www.spacex.com/launches/

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    Pan of LAWD 37

    by Shubnigg Added 110 Views / 0 Likes

    Hubble has used microlensing to measure the mass of a white dwarf star.The dwarf, called LAWD 37, is a burned-out star in the centre of this Hubble Space Telescope image that is featured in this pan video. Though its nuclear fusion furnace has shut down,

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    Hughes JUPITER 3 Mission

    by shub Added 110 Views / 0 Likes

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    Pan of HH 797

    by Shubnigg Added 110 Views / 0 Likes

    This image was captured with Webb’s Near-InfraRed Camera (NIRCam). Infrared imaging is powerful in studying newborn stars and their outflows, because the youngest stars are invariably still embedded within the gas and dust from which they are formed. The

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    very RED ALERT & Smoke 'em if you got 'em & take DEFCON WTF? 2024 up a notch, real talk.

    by Shubnigg Added 110 Views / 0 Likes

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    Wow. Texas

    by Shubnigg Added 110 Views / 0 Likes

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    by Shubnigg Added 110 Views / 0 Likes

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    by Shubnigg Added 110 Views / 0 Likes

    International Space Station crew members demonstrate their motion during a recent reboost of the oribal outpost. NASA astronaut Jasmin Moghbeli explains. Credit: NASA / Jasmin Moghbeli

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