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)
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01:10
Hoag's Object is a Cosmic Mystery
Added 250 Views / 0 LikesWithin the Serpent Constellation lies a galaxy within a galaxy within a galaxy called the Hoag's Object. - Learn More About This Cosmic Mystery: https://www.livescience.com/hoags-object-perfect-ring-mystery.htmlCredit: Live Science / produced & edited by
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06:47
Hubble at 30! New and favorites images explained by astrophysicist
Added 250 Views / 0 LikesSpace Telescope Science Institute astrophysicist Elena Sabbi talks to Space.com's Chelsea Gohd about the amazing new Hubble image released for the space telescope's 30th anniversary. Story: Hubble captures a 'Cosmic Reef' in stunning 30th anniversary imag
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03:02
SpaceX Crew-1 undocks from space station for return to Earth
Added 250 Views / 0 LikesSpaceX Crew Dragon Resilience undocked from the International Space Station on May 1, 2021 carrying Crew-1 astronauts Victor glover, Shannon Walker, Michael Hopkins and Soichi Noguchi. They are scheduled to splashdown off the coast of Florida on Sunday (M
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09:33
Wildfires! Power Outages! 3 Days of Severe Weather & all eyes on the Tropics & GOM August 16th+!
Added 250 Views / 0 LikesEnjoy this "lull" in the weather.It'll probably start getting exciting & dangerous againin about 10 days. God bless everyone,T LEWISON5430 BIRDWOOD RD. #416HOUSTON TEXAS 77096https://www.paypal.me/THORnewshttps://venmo.com/TEric-Lewison$THORnews on CashAp
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04:38
Video from Space - Weekly Highlights: Week of Aug. 30, 2020
Added 250 Views / 0 LikesVideos featured: Asteroid 2011 ES4 gives Earth a close shave, a full-size Space Launch System rocket booster was test fired, a triple-star system is warping its planet-forming disk, Arianespace launched a Vega rocket, SpaceX launched 60 new Starlink satel
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30:35
Starlink Mission Control Audio
Added 250 Views / 0 LikesThis is the vehicle trajectory and mission control audio without any additional commentary. There may be very long periods of silence. For our full hosted webcast, visit https://www.spacex.com/launches/
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17:33
Space Chat! We trash-talk space junk.
Added 250 Views / 0 LikesIt's a hard pill to swallow but Earth is kinda trashy. This week, Space.com senior writer Chelsea Gohd will be discussing and answering questions about "space junk," or discarded or defunct materials orbiting around our planet as recently, the Internation
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09:43
SpaceX launches Starlink sats on 10X used rocket, sticks landing
Added 249 Views / 0 LikesSpaceX launched 60 Starlink satellites atop a Falcon 9 rocket from PSpace Launch Complex 40 at Cape Canaveral Space Force Station in Florida on May 9, 2021. The first stage of the rocket, which has now flown 10 times, landed several minutes lates on the '
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07:26
Earth directed Solar Storm! 3 Sunspots! 6 C-class solar flares! Big Storms Fri Sat Sun & Volcanoes
Added 249 Views / 0 LikesThe Sun is LIT.God bless everyone,T LEWISON5430 BIRDWOOD RD. #416HOUSTON TEXAS 77096https://www.paypal.me/THORnewshttps://venmo.com/TEric-Lewison$THORnews on CashApphttps://www.patreon.com/thornews
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02:40
Space to Ground: Fast Track: 08/02/2019
Added 249 Views / 0 LikesNASA's Space to Ground is your weekly update on what's happening aboard the International Space Station. Got a question or comment? Use #AskNASA to talk to us.Learn more about the important research being operated on Station:https://www.nasa.gov/iss-scien
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04:45
Video from Space - Weekly highlights: Week of March 22, 2020
Added 249 Views / 0 LikesChina launched a Yaogon-30 family satellite, Elon Musk's companies has begun to distribute ventilators to hospitals for the COVID-19 outbreak, rock band Pearl Jam have released a 'Space-Invaders'-style game to promote their new album, the US Space Force l
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02:54
Spaceflight record breakers share self-isolation tips
Added 249 Views / 0 LikesRetired NASA astronauts Peggy Whitson and Scott Kelly share some self-isolation tips. Also, learn about what happened on the International Space Station this week and about astronaut Chris Cassidy's launch prep. -- NASA weighs measures to contribute to US
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16:19
SUPER COOL* NOSTRADAMUS* COMET F3 NEOWISE! MAYAN* RING OF FIRE SOLSTICE ECLIPSE! GFS 384 MADNESS!
Added 249 Views / 0 LikesMercury is stationing & going retrograde right now so my communication skills may be sub-optimal but I would like to say super thank you to Lyn, Tiara, JL, Brant, Rachel & Asteroid Fight Club. Y'all are awesome.God bless everyone,T LEWISON5430 BIRDWOOD RD