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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)

 

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    ISS Tour: Labs, Exercise Bike&Space Suits | Video

    by shub Added 813 Views / 0 Likes

    Expedition 33 commander Suni Williams showcases the Japanese, American and European laboratories are toured. Also a look at the station's space suits. Destiny, Columbus and Kibo nodes are toured.

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    How To Shave Your Head In Space | Video

    by shub Added 780 Views / 0 Likes

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    Astronaut Plays Flute on Space Station

    by shub Added 829 Views / 0 Likes

    Flight Engineer Cady Coleman demonstrates playing a flute on the International Space Station during an interview with National Public Radio's "All Things Considered." Credit: NASA/NPR

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    by shub Added 921 Views / 0 Likes

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    How To Wash Your Hands In Space | Video

    by shub Added 836 Views / 0 Likes

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    How To Barf, Puke, Vomit In Space | Video

    by shub Added 893 Views / 0 Likes

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    ISS Tour: Kitchen, Bedrooms&The Latrine | Video

    by shub Added 774 Views / 0 Likes

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    How To Brush Your Teeth In Space | Video

    by shub Added 636 Views / 0 Likes

    ISS commander Chris Hadfield explains how astronauts maintains oral hygiene aboard the International Space Station. -- Life in Space: Astronaut Chris Hadfield's Video Guide: http://goo.gl/fdgcgU

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    by shub Added 767 Views / 0 Likes

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    How Do You Sleep In Space? | Video

    by shub Added 836 Views / 0 Likes

    ISS commander Chris Hadfield shows how astronauts catch their Z's in Space. -- Life in Space: Astronaut Chris Hadfield's Video Guide: http://goo.gl/fdgcgU

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    Can You Cry In Space? | Video

    by shub Added 625 Views / 0 Likes

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    Wet Washcloth In Space - What Happens When You Wring It? | Video

    by shub Added 641 Views / 0 Likes

    International Space Station commander Chris Hadfield soaks a washcloth, gives it a twist, and...well, you'll see. -- Life in Space: Astronaut Chris Hadfield's Video Guide: http://goo.gl/fdgcgU

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    Astronaut Tips: How to Wash Your Hair in Space | Video

    by shub Added 815 Views / 0 Likes

    NASA astronaut Karen Nyberg shows how she washes her long hair in space while living in weightlessness on the International Space Station. Hint: No rinse shampoo is a must. Read more about it here: http://goo.gl/qlb8YT Credit: NASA

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    How to Cook Spinach In Space | Video

    by shub Added 735 Views / 0 Likes

    Canadian astronaut and ISS Commander Chris Hadfield shows how vacuum sealed dehydrated spinach is prepared to eat aboard the International Space Station. -- Life in Space: Astronaut Chris Hadfield's Video Guide: http://goo.gl/fdgcgU

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    Barren, Blasted Mercury Revealed In New Fly Over | Time Lapse

    by shub Added 869 Views / 0 Likes

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    by shub Added 792 Views / 0 Likes

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    by shub Added 840 Views / 0 Likes

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    by shub Added 843 Views / 0 Likes

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    Lego Space Shuttle Soars To Edge of Space | Video

    by shub Added 950 Views / 0 Likes

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    Comet's Tail Ripped Off By Sun's Fury

    by shub Added 915 Views / 0 Likes

    NASA's STEREO A satellite captured Comet Encke's tail being torn off by a coronal mass ejection in 2007. Magnetic field interactions are thought to be the culprit behind the comet losing its tail. Credit: NASA / Music: Atom Strange www.atomstrange.com

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