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)
01:55Added 11.1k Views / 0 Likes
Upcoming tele-operations test - Remote Robotic Oxidizer Transfer Test (RROxiTT) robot at the Kennedy Space Center will be controlled by engineers at the Goddard Space Center. A corrosive toxic liquid fuel (NTO) will be pumped into a mock satellite.
01:17Added 2,652 Views / 1 Likes
X-Rays Reveal Interactions Between Eta Carinae Stars | Video
09:41Added 2,257 Views / 0 Likes
A rare black widow binary star system consists of one of heaviest neutrons stars (~2X Sun Mass) known and a small companion star (12X Jupiter Mass) in the tightest orbit ever seen. High-energy particles from the former are obliterating its companion.
06:54Added 1,736 Views / 0 Likes
Mexican Eruption: We have a Volcano Problem pt. 2 - Fire, Ice & Ash
01:17Added 1,049 Views / 0 Likes
North Korea Looks Strangely Dark From Space In Asia Fly-Over | Video
01:11Added 1,033 Views / 0 Likes
NASA's 'Flying Saucer' Test - Launch and Powered Flight | Video
01:58Added 1,030 Views / 0 Likes
Andromeda and Milky Way Slow Dance to Merger | Animation
00:31Added 1,003 Views / 0 Likes
Orion Test Flight - Delta 4 Heavy Rocket Rolls Out | Time-Lapse Video
08:15Added 918 Views / 0 Likes
Splashdown! Orion Lands In Pacific Ocean After Picture Perfect Flight | Video
01:00Added 862 Views / 0 Likes
Griffith Observatory in Los Angeles, CA captured this time lapse imagery of the 'Blood Moon' lunar eclipse, from moments before Earth completely blocked the Moon's view of the Sun until full totality when the moon is fully bathed in 'umbral shadow.' Video
08:26Added 764 Views / 0 Likes
Binary Stars whizzed passed our Solar System. When?
05:19Added 740 Views / 0 Likes
Did Planet 9 TILT the entire Solar System?
01:12Added 698 Views / 0 Likes
Neptune's Spidery, Swirly Magnetic Field Finally Understood | Video
02:01Added 676 Views / 0 Likes
A .53 gram fragment of the meteor that stunned the world in February 2013 was imaged using X-ray tomography. It is an LL chondrite type meteor.
03:06Added 676 Views / 0 Likes
NASA's Jet Propulsion Laboratory tested its G-FOLD divert algorithm experimental landing system aboard the Masten rocket in Sept. 2013. This algorithm allows the rocket to autonomously select an alternate landing site.
01:37Added 630 Views / 0 Likes
NASA To Award $20K For Mars 'Ejectable Mass' Idea | Video
07:29Added 595 Views / 0 Likes
The Big Nibiru Nasa Google Sky Monolith Wormwood Winged Planet X Reveal!
08:46Added 589 Views / 0 Likes
Will Orbiting Carbon Observatory Magnify Energy Industry's PR Problem? | Video
02:21Added 589 Views / 0 Likes
Hands-On: OBERWERK MARINER 8x40 Binoculars for Sky-Watching
00:50Added 586 Views / 2 Likes
Zoom-in on the Orion Nebula