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)
-
06:55
Putin threatens World War 3. Again. 4 Days of Possible Severe Weather USA. Again. Geomagnetic Storm.
Added 86 Views / 0 Likeshi.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
-
01:47
Putting the Brakes on Muscle Breakdown
Added 381 Views / 0 LikesPutting the Brakes on Muscle Breakdown
-
04:08
Quadrantid 'Shattered Comet' Meteors Will Rain In New Year | Video
Added 505 Views / 0 LikesQuadrantid 'Shattered Comet' Meteors Will Rain In New Year | Video
-
02:11
Quadrantid Meteors and a Super Blue Blood-Moon in Jan. 2018 Skywatching
Added 413 Views / 0 LikesQuadrantid Meteors and a Super Blue Blood-Moon in Jan. 2018 Skywatching
-
03:05
Quadrantid Meteors, Mars and Antares in January 2020 Skywatching
Added 301 Views / 0 LikesThe Quadrantid Meteor Shower peaks on Jan. 4. The Red Planet and red giant star Antares are great skywatching targets as well this month. -- Best Telescopes for the Money: https://www.space.com/15693-telescopes-beginners-telescope-reviews-buying-guide.htm
-
04:10
Quadrantid meteors, planets and the moon in Jan. 2023 skywatching
Added 29 Views / 0 LikesThe Quadrantid meteor shower peaks on January 4th. Also, find out where and when to see Venus, Mercury and Saturn and the moon during the month. Night sky: What you can see this month: https://www.space.com/16149-night-sky.htmlBest night sky events this m
-
05:58
Quadruple Red Alert! Coronal Hole. Storm. Comet. Floods & ICE. 1/2 of America & Europe.
Added 366 Views / 0 LikesThis situation is unfolding to be a doozy. We're looking at a nasty snow-sleet-ice-rain-floods possible tornado storm starting Friday & through the Weekend. The Sun has a Major Coronal Hole. Comet 46/p Wirtanen is 10 days from it's close Earth approach. I
-
01:30
Quantum Effect Predicted In 1930s Possibly Observed For First Time | Video
Added 583 Views / 0 LikesQuantum Effect Predicted In 1930s Possibly Observed For First Time | Video
-
06:53
Queen legend Brian May talks NASA asteroid mission collaboration in exclusive interview
Added 57 Views / 0 LikesFamed Queen guitarist and citizen astronomer Brian May collaborated with NASA's asteroid mission OSIRIS-REx, helping scientists find a suitable landing spot on the space rock that turned out to be completely different from what they had expected and desig
-
03:35
Quick Questions With Crew-1
Added 102 Views / 0 LikesGo behind the online biography and hear the Crew-1 astronauts reveal their inner truths: favorite foods, guilty pleasures, the hardest part of training, and what’s left on their space-career bucket list. (And who loves salsa dancing, and shows it!)HD Down
-
03:35
Quick Questions with Crew-2
Added 151 Views / 0 LikesFour astronauts, from three countries, flying Crew-2, to the one and only International Space Station. Now that we have the basic facts, let’s explore. The astronauts about to launch on NASA’s SpaceX Crew-2 mission didn’t flinch when subjected to rapid-fi
-
02:59
Quick Questions with Crew-3
Added 79 Views / 0 LikesAstronauts are public figures and much of their history is well known, but not all of it. We “grilled” the astronauts flying to the International Space Station on NASA’s SpaceX Crew-3 mission – Raja Chari, Tom Marshburn, Kayla Barron, and Matthias Maurer
-
02:04
R Aquarri, Guitar nebula and more in amazing views from space telescopes
Added 98 Views / 0 LikesSee amazing views of binary system R Aquarii, supernova remnant Cassiopeia A (Guitar Nebula), Abell 2597.galaxy cluster and the NGC 4490 galaxy in composite imagery from the Chandra X-ray telescope and other space telescopes.
-
15:38
R U Ready 4 Nor'Easter #3 in 11 days? Nor'Easter Parade 2018
Added 416 Views / 0 LikesThis wave after wave after wave situation just keeps on getting more interesting with all of these winter hurricanes crashing on North Atlantic East Coast USA shores. God bless everyone,Thttps://www.paypal.me/THORnewshttps://www.patreon.com/thornews@newTH
-
01:06
Radar Pegs 3rd Closest Comet At 3000ft-Wide | Video
Added 607 Views / 0 LikesRadar Pegs 3rd Closest Comet At 3000ft-Wide | Video
-
01:17
Radiation exposure experiment moved outside Chinese space station
Added 68 Views / 0 LikesChinese astronauts have moved an "extravehicular radiation biological exposure experiment" to the exterior of the Tiangong space station through a cargo airlock. Full Story: https://www.space.com/astronauts-install-radiation-experiment-china-tiangong-spac
-
01:12
Radio signal from Venus turned into sound by NASA
Added 219 Views / 0 LikesNASA Parker Solar Probe flew through Venus' upper atmosphere in July 2020. It discovered a 'natural, low-frequency radio emission ' that has been sonified by NASA.Credit: NASA's Scientific Visualization Studio/Mark SubbaRao/Glyn Collinson
-
01:19
Radio Telescope Reveals Hundreds Of Hidden Galaxies Behind Milky Way's Haze | Video
Added 590 Views / 0 LikesRadio Telescope Reveals Hundreds Of Hidden Galaxies Behind Milky Way's Haze | Video