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)
07:27Added 399 Views / 0 Likes
Is CERN using its magnetic field to pull an asteroid to Earth?
05:51Added 432 Views / 0 Likes
NASA plans to shoot down Killer Asteroid with a Space Shotgun?
03:02Added 418 Views / 0 Likes
CERN - Nostradamus - RAYPOZ
03:58Added 378 Views / 0 Likes
Simple Weird Weather WTF? Jet Stream & Mean Sea Level Pressure
06:41Added 394 Views / 0 Likes
NASA gets mad at Orbital & Human Space exploration takes another step back.
01:05Added 383 Views / 0 Likes
New Pluto 'Aerial Tour' Created From Probe Images | Video
03:18Added 414 Views / 0 Likes
Solar Dinosaur, Active Earth facing Sunspot & a Sundiving Comet
01:53Added 277 Views / 0 Likes
Seeing Pluto's 'Ice-scapes' In A New Light | Video
05:11Added 466 Views / 0 Likes
3000 Comets discovered by NASA's SOHO satellite.
01:22Added 512 Views / 0 Likes
Dwarf Galaxy, Hiding In Plain Sight, Frames Distant Large Galaxies | Video
02:29Added 393 Views / 0 Likes
Tsunami Alert! California & West Coast on Alert after 8.3 Earthquake
03:11Added 337 Views / 0 Likes
California is on Fire.
10:52Added 297 Views / 0 Likes
WTF? the 100 year Bond market is crashing.
06:47Added 395 Views / 0 Likes
WTF? Planet Venus is a Comet? Her tail is kicking.
01:11Added 377 Views / 0 Likes
Death-Diving Comet Plunges Into Sun | Video
04:45Added 356 Views / 0 Likes
Blue Origin Invests $200 Million In Florida Launch Complex | Video
08:44Added 469 Views / 0 Likes
Scientists find evidence of Planet X - Part 2 - Massive Planet, STRONG EVIDENCE
02:44Added 419 Views / 0 Likes
Japan's largest Volcano Erupts: Kyushu Islands
06:37Added 391 Views / 0 Likes
Are we being Blackmailed? Climate Change Chaos - 500 days
03:11Added 424 Views / 0 Likes
Dear Russia, China & USA - Please Avoid World War 3