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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03:38
RED ALERT! Danger! Big Storms & Floods headed to USA & MEXICO
Added 653 Views / 0 LikesRED ALERT! Danger! Big Storms & Floods headed to USA & MEXICO
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01:15
RED Alert! Danger! Godzilla Typhoon Cyclone Hurricane Pacific Pattern confirmed
Added 307 Views / 0 LikesThis is like weird science fiction weather & it is really happening. God bless Everyone,T
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18:50
Red Alert! Danger! Hurricane Ophelia! 4 Cyclones in Pacific! NW Rain Train! & More!
Added 527 Views / 0 LikesRed Alert! Danger! Hurricane Ophelia! 4 Cyclones in Pacific! NW Rain Train! & More!
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07:27
RED ALERT! Dangerous Severe Weather Monday & GFS/EURO lock on Carolinas TS / Hurricane 10 days out!
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09:39
RED ALERT! Dangerous Storm on Tuesday & Mars Retrograde got Angry people Angrier!
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17:19
RED ALERT! Dangerous week ahead! Canada Heat Record Broken! Heatwave! Fires! Floods! WTF Surprises!
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06:42
RED ALERT! Deadly FOG possible for Gulf Coast! Harmful NFT Party lights! & very distant Black Hole.
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04:36
Red Alert! Deadly Monster Tornadoes continue across Kentucky & the South.
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03:37
RED ALERT! DEADLY SUPER CELL TORNADO STILL ON THE GROUND IN LOUISIANA & MOVING TO MISSISSIPPI
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05:25
Red Alert! Deadly Tornadoes yesterday & the possibility for Dangerous Tornadoes Today & Tomorrow.
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06:15
RED ALERT! Defcon WTF Friday the 13th. Global Threats, Regional Evacuations & Jupiter's been struck?
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03:17
RED ALERT! DEFCON WTF! Russian Missiles land in Poland a NATO nation!
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02:11
RED ALERT! Double Eurocane hit for UK & France? and. Hurricane Watch for USA!
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08:06
Red Alert! Double Hurricane hits on New Orleans? Models say Yes but more surprises in Store!
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06:37
Red Alert! Double Hurricanes to hit USA in next 2 weeks? Horrible Pakistan Flooding! CA Heatwave!
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10:45
Red Alert! Double Tropical Trouble! Hurricanes or Tropical Storms? Only Time will Tell. R U READY?
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04:21
Red Alert! Double Trouble Hurricane Season Watch! and a lot more Severe Weather.
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06:28
RED ALERT! Double Trouble Hurricane Watch and USA Severe Weather through Sunday.
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08:37
Red Alert! DVD Sized Hail possible tonight! Wild 6 Day Severe Weather& WildFire Watch begins!
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07:09
Red Alert! Ecuador Volcano Erupts! Tornadoes & Severe Weather Possible Sat Sun & Mon! GIANT BOULDER.
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