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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NASA's Artemis 1 Orion spacecraft completed a distant retrograde orbit departure burn on Dec. 1, 2022. It's the first of 2 burns needed to leave lunar orbit for its return trip to Earth. Credit: NASA
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James Webb Space Telescope and the W.M. Keck Observatory captured new images of Saturn's moon Titan in November 2022. Credit: NASA/STScI/W. M. Keck Observatory/Judy Schmidt | edited by Space.com's [Steve Spaleta](https://twitter.com/stevespaleta)Music: Bi
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See Mars disappear behind the Moon on Dec. 7 and find out when you can see the Jupiter, Saturn and more while skywatching this month. The constellation of Pegasus is also a highlight. Night sky: What you can see this month: https://www.space.com/16149-nig
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Galaxy merger Arp-Madore 417-391 is on display in this new image captured by the Hubble Space Telescope's Advanced Camera for Surveys (ACS). The merger is about 670 million light-years away from Earth. Credit: ESA/Hubble & NASA, Dark Energy Survey/DOE/FNA
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☄️ What do we know about the asteroids and comets in Earth's neighborhood? Planetary defense — which includes finding, tracking, and characterizing these near-Earth objects — is part of our mission. Here's what we've found so far.Learn more about Planetar
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Planetary defense includes finding, tracking, & characterizing near-Earth objects. Here's what we've found so far. #shorts
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Cameras mounted on NASA's Artemis 1 Space Launch System rocket and Orion spacecraft captured footage of its launch on Nov. 16, 2022. See the highlights. Credit: NASA
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A SpaceX Falcon 9 Block 5 rocket will launch the iSpace Mission 1 to the Moon. The first lunar lander, called Hakuto-R Mission 1 (M1), was assembled in partnership with ArianeGroup and carries a package of international and commercial payloads for firms i
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China has test-fired reusable rocket engine that has 130-tons of thrust. The test occurred on Nov. 26, 2022 at a facility in Xi'an, Shaanxi Province in northwestern China.Credit: China Central Television (CCTV)
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This image takes the viewer to space to finish at Webb’s view of the galaxy merger II ZW 96. This pair of galaxies is roughly 500 million light-years from Earth and lies in the constellation Delphinus, close to the celestial equator. As well as the wild s
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This video features the chaotic merging galaxies II ZW 96, which have been examined in two distinct wavelengths by the NASA/ESA Hubble Space Telescope and the NASA/ESA/CSA James Webb Space Telescope.The image shown first was taken by Hubble’s Advanced Cam
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A merging galaxy pair cavort in this image captured by the NASA/ESA/CSA James Webb Space Telescope. This pair of galaxies, known to astronomers as II ZW 96, is roughly 500 million light-years from Earth and lies in the constellation Delphinus, close to th
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Orion has now flown "farther than any spacecraft built to fly Human, more than 268,000 miles," according to NASA. Learn about the Artemis 1 record-breaking feat and more in this mission update. Credit: NASA
More Strange Canada Earthquakes! Late November USA Tornadoes! Lots o Rain & Snow for the West Coast!Added 4 Views / 0 Likes
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Shenzhou 15 astronauts Fei Junlong (commander), Deng Qingming and Zhang Lu completed ingress into the Tiangong space station on Nov. 29, 2022 (Nov. 30 - Beijing time) shortly after docking. See them launch: https://www.space.com/china-launches-shenzhou-15
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Artemis All Access – Episode 3Artemis All Access is your look at the latest in Artemis I, the people and technology behind the mission, and what is coming up next. This uncrewed flight test around the Moon will pave the way for a crewed flight test and fu
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SpaceX conducted a long duration static-fire test of Super Heavy Booster 7 at their Starbase facility in Texas. Anthony Gomez captured video of the test from a few miles away at the [Rocket Ranch, Texas outpost](https://www.rocketranchbocachica.com/). Cre
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NASA Artemis 1 mission has been a great success since it launched on Nov. 16, 2022. See some highlights from the first 13 days of the mission.Credit; NASA
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A Long March 2F rocket launched the Shenzhou 15 spacecraft carrying astronauts Fei Junlong (commander), Deng Qingming and Zhang Lu to the Tiangong space station on Nov. 29, 2022 at 10:08am ET (23:08 BJT - 15:08 GMT).Broadcast feed from the Jiuquan Satelli