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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How The Sun Cooks Comets | Video
Added 619 Views / 0 LikesNASA explains how a comet goes through the process of sublimation as it nears the Sun.
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Added 670 Views / 0 LikesCanadian astronaut David Saint-Jacques explains how the Station's Canadarm2 captures spacecraft using a Canadian Space Agency simulator. ESA astronaut Andreas Mogensen hosts.
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How To Barf, Puke, Vomit In Space | Video
Added 840 Views / 0 LikesHow do you upchuck if there is no up or down? ISS commander Chris Hadfield explains what astronauts do if they have to vomit. -- Life in Space: Astronaut Chris Hadfield's Video Guide: http://goo.gl/fdgcgU
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How To Brush Your Teeth In Space | Video
Added 587 Views / 0 LikesISS 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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How to Build a Mars Rover – from 'Voyage of Curiosity' | Exclusive Video
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How to Cook Spinach In Space | Video
Added 683 Views / 0 LikesCanadian 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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How to Deflect an Asteroid - Crash Into It?
Added 283 Views / 0 LikesNASA and Los Alamos Labs are studying how to deflect an asteroid. NASA's DART asteroid impactor mission will crash into an asteroid to test how it will effect its motion. -- NASA Will Aim a DART at Target Asteroid in Upcoming Deflection Test: https://www.
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How To Deploy Tiny Satellites From Space Station | Video
Added 726 Views / 0 LikesJAXA's ISS Program Manager Masazumi Miyake explains how 3 nanosatellites (aka cubesats) were deployed from the Japanese 'Kibo' Experimental Module on Nov. 19. 2013. Read more about it here: http://goo.gl/UGcX1M
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How to explore frozen worlds - Hopping robots!
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How To Find Jupiter and Other Skywatching Objects in July 2016 | Video
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How to fly a moon-g parabolic flight - Novespace head pilot explains
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How to Get Mars Samples to Earth - 3 Missions Necessary?
Added 403 Views / 0 LikesNASA and ESA are considering the options for delivering samples of Mars surface to Earth. This NASA video explores using a 2 rovers and an orbiter. --- Scientist debate how to do it: https://www.space.com/37815-nasa-mars-sample-return-plans.htmlCredit: NA
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How To Make an Origami BEAM – Fold your own space station module!
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How To Mate With A Space Station | 'Soyuz Cam' Video
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