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)
-
01:47
Farewell Opportunity! NASA Mars Rover's Incredible Mission Ends
Added 725 Views / 1 LikesNASA made its final planned call to the Opportunity Rover and they did not hear back. What was intended to be a 90-day mission turned into a 14.5+ year epic journey on the Red Planet. -- Opportunity is Dead: https://www.space.com/mars-rover-opportunity-de
-
01:40
Stunning Supernova Remnant in the Large Magellanic Cloud - Hubble Zoom-In Video
Added 560 Views / 1 LikesStunning Supernova Remnant in the Large Magellanic Cloud - Hubble Zoom-In Video
-
02:31
Touchdown! SpaceX rocket lands after latest Starlink launch
Added 343 Views / 1 LikesA SpaceX Falcon 9 rocket first stage landed on the “Of Course I Still Love You” drone ship in the Atlantic Ocean on Jan. 29, 2020 after launching 60 more Starlink satellites. Credit: SpaceX
-
07:59
Antarctica Ice Shelf could break off any minute now.
Added 544 Views / 1 LikesAntarctica Ice Shelf could break off any minute now.
-
08:40
NASA's Innovative Advanced Concepts
Added 474 Views / 1 LikesNASA's Innovative Advanced Concepts
-
08:26
Instant Freeze Danger & East Coast Storm + Ice Wind Snow Rain Power Outages
Added 401 Views / 1 LikesThis storm could end with an instant freeze surprise. please stay aware and be prepared.God bless everyone,Thttps://www.paypal.me/THORnews@newTHOR on twitterhttps://www.facebook.com/thornewsgoTshirtshttps://hitthebuttonbaby.com/the crankywxguy bloghttp://
-
01:28
Gravitational Waves Simply Explained With A Cube And Marble | Video
Added 748 Views / 1 LikesGravitational Waves Simply Explained With A Cube And Marble | Video
-
15:03
Will Comet Nibiru Planet X hit Earth & destroy Mankind on September 23 2016 ?!??
Added 670 Views / 1 LikesWill Comet Nibiru Planet X hit Earth & destroy Mankind on September 23 2016 ?!??
-
04:34
Most Underrated Place to Go in Our Solar System - 'Travel Agents' Explain
Added 515 Views / 1 LikesMost Underrated Place to Go in Our Solar System - 'Travel Agents' Explain
-
01:02
Animation: Black Hole Merger That Created 4th Gravitational Waves Detection
Added 701 Views / 1 LikesAnimation: Black Hole Merger That Created 4th Gravitational Waves Detection
-
03:47
NASA Launches Supersonic Parachute Test on Sounding Rocket
Added 600 Views / 1 LikesNASA Launches Supersonic Parachute Test on Sounding Rocket
-
01:08
Missile Intercept Test Video Released By DOD
Added 407 Views / 1 LikesMissile Intercept Test Video Released By DOD
-
01:34
Volcanic Eruption Snapped From Space | New Video Visualization
Added 796 Views / 1 LikesOn June 12, 2009, the Sarychev Volcano, on Matua Island, northeast of Japan, erupted explosively as it has previously in 1989, 1986, 1976 and 1946. An ISS astronaut grabbed this shot, recently processed into animation by NASA.
-
02:13
Touchdown! SpaceX 1st Stage Lands After Launch From Apollo-Era Pad | Video
Added 653 Views / 1 LikesTouchdown! SpaceX 1st Stage Lands After Launch From Apollo-Era Pad | Video
-
02:33
Jupiter At Opposition - Hubble Snaps New Views of Gas Giant | Video
Added 656 Views / 1 LikesJupiter At Opposition - Hubble Snaps New Views of Gas Giant | Video
-
14:07
Tropical Storm Cindy Update: 15+ inches of rain possible for Gulf Coast
Added 602 Views / 1 LikesTropical Storm Cindy Update: 15+ inches of rain possible for Gulf Coast
-
08:33
200+ mph Wind Speeds possible w Cat 5 Hurricane Irma - Texas to Florida to East Coast be on Alert!
Added 633 Views / 1 Likes200+ mph Wind Speeds possible w Cat 5 Hurricane Irma - Texas to Florida to East Coast be on Alert!
-
09:16
MAJOR Storms to bring Floods & Wind Damage to USA through Weekend
Added 618 Views / 1 LikesMAJOR Storms to bring Floods & Wind Damage to USA through Weekend
-
01:00
Solar Eclipse 'Diamond Ring' Above Oregon
Added 510 Views / 1 LikesSolar Eclipse 'Diamond Ring' Above Oregon
-
00:47
Where Cassini Crashed Into Saturn - NASA Explains
Added 538 Views / 1 LikesWhere Cassini Crashed Into Saturn - NASA Explains