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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Major Floods & Rain for Florida & East Coast
Added 2 Views / 0 LikesDon't be scared. Be prepared. God bless everyone,T
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Blastoff! Cygnus Rides to Space Station Atop Antares Rocket
Added 3 Views / 0 LikesAn Orbital ATK Cygnus spacecraft carrying supplies and experiments to the International Space Station launched from NASA’s Wallops Flight Facility on May 21, 2018. Credit: NASA
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OTD in Space – May 20: NASA Launches Pioneer Venus 1
Added 11 Views / 0 LikesOn May 20, 1978, NASA launched a spacecraft to Venus. The mission was called Pioneer-Venus 1, but it’s also known as the Pioneer Venus Orbiter. This was the first of two spacecraft that made up the Pioneer Venus mission. Pioneer Venus 2 launched a couple
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Added 6 Views / 0 LikesI am not a professional Meteorologist, Volcanoist, Earthquaekist.like they don't invite me to science talks and debates either. Please watch the 7 min video I edited before I made this conversational one taker if you want to get up to full speed.This vide
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Water on Europa - Old Galileo Mission Data Leads to New Evidence
Added 4 Views / 0 LikesAn analysis of old and new data on the plumes of Europa has led to new evidence of water on the Jovian Moon. -- Learn More: https://www.space.com/40575-jupiter-moon-europa-plume-galileo-spacecraft.htmlCredit: NASA/JPL-Caltech
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Added 7 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 #spacetoground to talk to us.For more information about STEM on Station:https://www.nasa.gov/audience/foreducators/stem
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What's the New NASA Admin's Position on Climate Change?
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Watch Jupiter’s Clouds Move in Mesmerizing Animation
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TBRC: Hawaii Volcano could explode. How to stop Lava? Historic Montana Floods,
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What's a Block 5? SpaceX's Upgraded Falcon 9 Rocket Explained
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