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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05:17
Red Alert! Flash Flood watches up in Multiple states across the USA +Tropical Storm D'Arlene
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07:58
Red Alert! Flooding & Severe weather on the way + wild looking Arizona fire.
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03:13
RED ALERT! Floods coming to California! & San Antonio Texas Tornadoes possible tomorrow!
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11:56
Red Alert! Floody Week for Mid-East USA! Iceberg the size of LA breaks off Antarctica! +Volcanoes!
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08:17
Red Alert! Florida & Georgia 1000 year storms possible! Major Coronal Mass Ejection! CA Heat Records
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06:18
Red Alert! Florida fires & Arkansas Tornadoes on the Ground! We r in for a WILD 2 weeks of weather!
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08:46
Red Alert! Florida Flood & October 7* HURRICANE WATCH for FL & Gulf of Mexico!!!
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13:46
Red Alert! Florida! East Coast! Puerto Rico! Sally* could be a Major Hurricane & a MAJOR PROBLEM.
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02:47
RED ALERT! Florida! Tornadoes in the Panhandle! More tornadoes tonight!
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07:50
Red Alert! Florida! Wild Burst of Convection with Tropical Storm Isaias! FLOOD WATCH.
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14:12
Red Alert! Florida, Georgia & Carolina floods this week. More Monsoon troubles & more earthquakes.
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01:14
RED ALERT! Galveston Texas! Tornado headed your way! Take shelter!
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09:40
Red Alert! Giant Hail & Tornadoes possible in Texas today! TS / Hurricane* Watch for late May! HEAT.
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07:19
Red Alert! Giant Waves & Flooding for Europe! Stormy Week for USA! Big & Active Sunspot!
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05:38
Red Alert! Global Markets enter Bear Market as USA markets continue to Slide deep down.
Added 618 Views / 0 LikesRed Alert! Global Markets enter Bear Market as USA markets continue to Slide deep down.
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09:39
RED ALERT! Hail & Tornado Watches for Illinois Indiana Iowa & Wisconsin! big Texas Wildfires & more!
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05:18
Red Alert! HAILMAGGEDON continues for Texas today & South East USA tomorrow!
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13:27
Red Alert! Hawaii Volcano & Florida & East Coast Flooding problems coming up
Added 493 Views / 0 LikesFlorida & the East Coast are looking at Major flooding over the next 10 days. Montana & Washington are also looking at major river flooding problems in the next week. and Hawaii's Kiluea volcano is on official aviation red alert due to an impending explos
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01:07
Red Alert! Here come the Storms.
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