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)
-
03:44
Perseverance's Mars landing attempt will be 'most dangerous yet'
Added 157 Views / 0 LikesThere are "many things that have to go right" for Perseverance to successfully land on Mars, according to NASA's Swati Mohan. Learn what the rover will be dealing with during descent and landing at Mars' Jezero Crater. Credit: NASA/JPL-Caltech
-
02:35
Perseverance's Mars sample caching system - How does it work?
Added 161 Views / 0 LikesNASA's Perseverance team explains how the sample caching system on the Perseverance rover works. NASA's Perseverance rover gears up to capture its 1st Mars rock sample: https://www.space.com/nasa-perseverance-rover-first-mars-rock-sampleCredit: NASA/JPL-C
-
03:16
Perseverance's sounds of Mars recordings explained by NASA
Added 158 Views / 0 LikesNASA's Perseverance rover has been capturing audio on Mars. Scientists explain what you're hearing. Credit: NASA
-
01:10
Perseverance's wind sensor deployed in latest pics from Mars
Added 213 Views / 0 LikesThe Perseverance rover's Mars Environmental Dynamics Analyzer (MEDA) is set to collect data on wind with the deployment of a sensor on Mar. 1, 2021 (Sol 10). See imagery of the deployment and hear audio of the Martian wind captured by a microphone on Feb.
-
02:01
Perspective. You think you're having a bad day?
Added 346 Views / 0 LikesI've got 2 hours of edited footage like this.God bless everyone,TGod bless everyone,Thttps://www.paypal.me/THORnewsTshirtshttps://hitthebuttonbaby.com/THORNEWS PO BOX 35946HOUSTON TEXAS77235-5946
-
01:01
Pew pew! NASA beams cat video 19 million miles through space using a laser
Added 40 Views / 0 LikesNASA tested laser communications from space with a video of a cat chasing a laser dot! Psyche beamed the video about 19 million miles back to Earth on Dec. 11, 2023. Credit: Space.com | footage courtesy: NASA | edited by [Steve Spaleta](https://twitter.co
-
00:55
Pew, Pew! Mars 2020 Rover's Laser Fired for First Time
Added 313 Views / 0 LikesNASA's Mars 2020 Supercam laser was tested for the first time on July 20, 2019 at the Jet Propulsion Laboratory in Pasadena, California. -- Curiosity Fire Laser On Its Own: https://www.space.com/33506-mars-rover-curiosity-fires-laser-by-itself.htmlCredit:
-
00:56
Pew, Pew! NASA's Parker Solar Probe Tested with Lasers
Added 528 Views / 0 LikesPew, Pew! NASA's Parker Solar Probe Tested with Lasers
-
02:12
Pew, Pew! Navy Laser Blasts Targets In Air, On Sea | Raw Video
Added 630 Views / 0 LikesPew, Pew! Navy Laser Blasts Targets In Air, On Sea | Raw Video
-
01:12
Pew, Pew! Watch Navy Laser Shoot Down Drone
Added 510 Views / 0 LikesPew, Pew! Watch Navy Laser Shoot Down Drone
-
13:07
PG&E = 3rd Largest Bankruptcy. What happens to their private Nuclear Power Plants?
Added 352 Views / 0 LikesWarning: this story is scary & I need a miracle.https://www.paypal.me/THORnewsGod bless everyone,Tarticlehttps://www.zerohedge.com/news/2019-01-29/facing-billions-dollars-fire-costs-pge-files-bankruptcyPG&E Files For Bankruptcy Protection With $50 Billion
-
16:58
PG&E begins to Cut Power to 800,000 California Customers for up to 5 Days for Strong Santa Ana Event
Added 276 Views / 0 LikesThis story is pretty wild. please also check out Ice Age Farmer's video. He is a Nor Cal guy. https://www.youtube.com/watch?v=XpT6N7OZ_FwNow is a Great time for all Americans to UniteGod bless everyone,Tfrom various articlesMore than 250,000 Pacific Gas &
-
01:07
Phantom Galaxy through James Webb and Hubble 'eyes' is absolutely stunning
Added 100 Views / 0 LikesThe Phantom Galaxy (M74) has been imaged in infrared and optical light using the James Webb Space Telescope and Hubble Space Telescope. The spiral galaxy is about 32 million light-years from Earth. Credit: Space.com | imagery courtesy: ESA/Webb, NASA & CS
-
02:32
Phases Of Venus And Geminids Reign In December 2013 Skywatching | Video
Added 638 Views / 0 LikesVenus shines its brightest at 4.9 magnitude this month, the Geminid Meteor Shower peaks in mid December and more!. - - Best Telescope Reviews and Buying Guide: http://goo.gl/0qokRy
-
01:44
Philae Lander Seen Post-Touchown By Rosetta? + New Descent Pics | Video
Added 704 Views / 0 LikesPhilae Lander Seen Post-Touchown By Rosetta? + New Descent Pics | Video
-
02:15
Philae Lands On Comet! - Mission Control Celebrates | Video
Added 618 Views / 0 LikesPhilae Lands On Comet! - Mission Control Celebrates | Video
-
01:22
Photographer Penetrates Singapore Light-Pollution For Milky Way Time-Lapse Video
Added 726 Views / 0 LikesJustin Ng (justinngphoto.com) contrast-stretched digital images to reveal the Milky Way above Singapore along with a rising Venus. The city's many uncontrolled lights and hazy skies usually conspire to hide the cosmos.
-
02:09
Pieces of asteroid Vesta found on asteroid Bennu
Added 274 Views / 0 LikesNASA thinks that a fragment of asteroid Vesta impacted asteroid Bennu and left bright bolders scattered on the Bennu's southern hemisphere. The bolders have been studied using NASA's OSIRIS-REx mission.Credit: NASA Goddard Space Flight Center
-
01:13
Pillars of Creation, Milky Way's core and more turned into amazing music
Added 239 Views / 0 LikesVisualization scientist Kimberly Arcand and SYSTEMS Sound project's Matt Russo and Andrew Santaguida collaborated to sonify imagery from the Chandra X-ray Observatory and other telescopes.Credit: NASA/CXC/A. Hobart