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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08:27
RED ALERT! "SERIOUS UNDISCLOSED NATIONAL SECURITY THREAT" reported. Dangerous New Technologies?
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03:23
RED ALERT! "So many natural disasters happening all at once."
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08:18
Red Alert! 10 Days of Wild & Dangerous Weather for USA & Canada has begun! + Solar Storm?
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16:37
Red Alert! 10 Days of Wild Weather USA kicks off in 48 Hours! & More Flood Trouble for Australia!
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10:53
RED ALERT! 10+ Days of Wild, Wacky Severe Weather & Wildfires ahead for USA!
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02:39
RED ALERT! 1000+ Wrecks in DFW Texas Today! Tomorrow will also be Dangerous due to ICE #ICEMAGEDDON
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09:18
Red Alert! 1200 mile USA wind storm! California Snow & Rain Storm! Bomb Nor'Easter? BC Canada Freeze
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10:38
Red Alert! 143 Degrees in India!!! BIG Week of Post Solar Eclipse Severe Weather & Wildfires!
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12:15
Red Alert! 15 inches of rain & Big Texas & Southern Flood possible next 72 hrs & Guatemala Volcano
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03:38
Red Alert! 1500+ Earthquakes put Iceland in a State of Emergency!
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12:50
RED ALERT! 172 MPH Surface Winds & Odds Increasing Hurricane Dorian hits Florida!
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04:43
Red Alert! 18 feet of snow for California?!?! 72 Hour Atmospheric River Storm about to begin!
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09:51
Red Alert! 1800 Mile Winter Storm begins now & will be a Major Ice event & have a Texas Blizzard!
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06:50
Red Alert! 1st TORNADO Watches are Up for a VERY Active & Dangerous 5 Day Weather Pattern for USA
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04:24
RED ALERT! 1st* Ever Hurricane Wind Warnings up for parts of California as a Heart shape storm hits!
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04:44
RED ALERT! 2 Landfalling Hurricanes on Florida & the Gulf are possible in the next FIVE DAYS.
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06:50
RED ALERT! 20+ inches of Rain for 45% of California over next 2 weeks? Tornadoes 4 the South Today!
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09:09
Red Alert! 2000 Mile Ice & Snow & Heavy Flooding Rain storm to Stretch across the USA Midweek!
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14:11
RED ALERT! 2000 Mile Ice & Snow storm probable from Dallas to Newfoundland! + a Solar Storm.
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08:47
RED ALERT! 2024 begins very wild weird & dangerous! 3 USA Tornado & Snow Storms in 10 days! + more
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