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)
01:35Added 108 Views / 0 Likes
On Dec. 17, 2018, the International Astronomical Union’s Minor Planet Center announced that 2018 VG18, nicknamed ‘Farout’, has been discovered. It now holds the record form farthest object observed in our solar system at 120 astronomical units (AU) away f
02:30Added 369 Views / 0 Likes
The third generation advanced Tracking and Data Relay Satellite (TDRS-L) will deliver a boost in transmitting power and a higher frequency band for video and data. It is set to launch on January 23rd, 2014.TDRS-L and Atlas V Readied for Liftoff
02:40Added 448 Views / 0 Likes
NASA's Low-Density Supersonic Decelerator (LDSD) system will lofted to 120,000 feet, via large scientific balloon. An attached rocket will propel the test article into a test trajectory.
01:06Added 384 Views / 0 Likes
'God Save The Queen' From Space -- UK Astronaut's Message | Video
02:50Added 362 Views / 0 Likes
SPOILER ALERT - Fmr. NASA astronaut Tom Jones talks about how similar some of the aspects of the movie are to the real thing. Recorded at Popular Mechanic's screening of the movie on October 3rd, 2013. (Many key elements of the movie are discussed) -- Mor
03:34Added 377 Views / 0 Likes
Which do astronauts dread more: Death in orbit? Or breaking something unique and expensive? ISS astronaut Cady Coleman and "Hubble Repairman" Mike Massimino open up to SPACE.com's @DavidSkyBrody of personal worries and human relations in space.
01:51Added 345 Views / 0 Likes
'Grazing' Saturn's Rings - Cassini Spacecraft Will Get Closer Than Ever | Video
01:05Added 436 Views / 0 Likes
'Great Eruption' Nebula Visualization is 3D Printable | Video
00:57Added 398 Views / 0 Likes
Europe's Very Large Telescope captured imagery of planetary nebula IC 1295. It can be found in the constellation of Scutum (3300 light years away).
01:16Added 388 Views / 0 Likes
'Guitar God' Joe Satriani’s Pluto Fly-By Impressions | Music + Video
01:06Added 418 Views / 0 Likes
A solar flare erupted from an active region on the Sun on April 4th, 2014. NASA's Solar Dynamics Observatory caught a close-up view of the turning and shifting plasma.
00:43Added 485 Views / 0 Likes
'Halo' Of Echoing X-rays From Magnetar Outburst | Video
03:40Added 313 Views / 0 Likes
'Hidden Figures' Stars: Pre-Civil Rights 'Mindset' Was Acting Challenge | Exclusive Video
01:01Added 116 Views / 0 Likes
Using the Very Large Telescope in Chile, astronomers have detected an “exoplanet atmosphere that is free of clouds,” according to the University of Exeter. -- Full Story: https://www.space.com/40526-alien-planet-wasp-96b-has-no-clouds.htmlCredit: Space.co
01:15Added 334 Views / 0 Likes
'Huge Revolution In Spaceflight' - Elon Musk Comments on 1st Reused SpaceX Rocket | Video
01:12Added 46 Views / 0 Likes
A Hubble Space Telescope observation of active galaxy NGC 3147 has revealed that the supermassive black hole at its core has a peculiar disk surrounding it. Surprise! This Monster Black Hole's Disk Shouldn't Exist: https://www.space.com/black-hole-disk-sh
01:31Added 367 Views / 0 Likes
'Interplanetary Shock' In Earth's Magnetic Field Observed By Van Allen Probes | Video
00:55Added 88 Views / 0 Likes
Space.com's Mike Wall asks NASA astronaut Reid Wiseman about the difficulties of spaceflight during a NASA press conference about the Soyuz launch abort that occurred on Oct. 11, 2018. -- Full Story on the Launch Abort on Space.com: https://www.space.com/
01:41Added 380 Views / 0 Likes
'JEDI' Aboard NASA's Juno Probe To Jupiter | Video
01:36Added 301 Views / 0 Likes
'Jellyfish' Galaxies Feed Supermassive Black Holes