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Outer Space & Universe

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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)

 

  • 11:03 Blastoff! NASA's Jonny Kim and 2 cosmonauts launch to ISS aboard Soyuz rocket

    Blastoff! NASA's Jonny Kim and 2 cosmonauts launch to ISS aboard Soyuz rocket

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    NASA's Jonny Kim along with Russia's Sergey Ryzhikov and Alexey Zubritsky, launched to the International Space Station atop a Soyuz 2.1a rocket from Russia's Baikonur Cosmodrome in Kazakhstan on April 8, 2025 at 1:47 a.m. EDT (0547 GMT or 10:47 a.m. local

  • 00:30 Pan video: NGC 1514 (MIRI image)

    Pan video: NGC 1514 (MIRI image)

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    The NASA/ESA/CSA James Webb Space Telescope has taken the most detailed image of planetary nebula NGC 1514 to date thanks to its unique mid-infrared observations. Webb shows its rings as “fuzzy,” intricate clumps of dust. It’s also easier to see holes pun

  • 08:58 NASA's SpaceX Crew-9 with Starliner astronauts undocks from space station for return trip

    NASA's SpaceX Crew-9 with Starliner astronauts undocks from space station for return trip

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    NASA astronauts Butch Wilmore, Suni Williams, and Nick Hague along with Roscosmos cosmonaut Aleksandr Gorbunov undocked from the International Space Station on March 18, 2025 at 1:05 a.m. EDT. They will conduct a deorbit burn at 5:11 p.m. EDT (2111 GMT),

  • 00:45 potm2409a

    potm2409a

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    The open cluster Westerlund 1, showcased in this new Webb Picture of the Month, is located roughly 12 000 light-years away in the southern constellation Ara (the Altar) where it resides behind a huge interstellar cloud of gas and dust. It was discovered i

  • 01:46 Star cluster resembles 'cosmic wreath' in Chandra X-ray Telescope tour for holidays

    Star cluster resembles 'cosmic wreath' in Chandra X-ray Telescope tour for holidays

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    Check out an amazing view of star cluster NGC 602 for the holidays. It "lies on the outskirts of the Small Magellanic Cloud," according to the Chandra X-ray Telescope team. Credit: NASA/CXC/A. Hobart

  • 01:08 Fireball! Chinese satellite burns up over several US states

    Fireball! Chinese satellite burns up over several US states

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    The American Meteor Society received several reports of a fireball in the skies over several cities US states on Dec. 22, 2024. The fireball appears to be the re-entering Chinese GaoJing 1-02 satellite, according to a Bluesky post from Jonathan McDowell,

  • 08:17 RED ALERT! Wild Weather Saturday for the Southeast USA & extra active ocean waves for the Americas.

    RED ALERT! Wild Weather Saturday for the Southeast USA & extra active ocean waves for the Americas.

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    stay amazing.God bless everyone,T

  • 01:30 How Do Astronauts Exercise in Space?

    How Do Astronauts Exercise in Space?

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    Astronauts aboard the International Space Station typically exercise for two hours each day. From running to cycling to weightlifting, learn how crew members complete fitness regimens in space and commit to staying healthy – even in microgravity.Credit: N

  • 02:30 James Webb Space Telescope amazing view of protostar explained by NASA

    James Webb Space Telescope amazing view of protostar explained by NASA

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    Travel to James Webb Space Telescope's NIRCam and MIRI instrument views of protostar L1527. The protostar is about 100,000 years old. [Full Story](https://www.space.com/james-webb-space-telescope-cosmic-hourglass)Credit: NASA Goddard Space Flight CenterPa

  • 00:58 Blue Origin New Glenn #launch #space #spaceflight #rocketlaunch @LoganSpaleta #music

    Blue Origin New Glenn #launch #space #spaceflight #rocketlaunch @LoganSpaleta #music

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    Blue Origin launched the powerful New Glenn rocket for the first time from Cape Canaveral Space Force Station in Florida on Jan. 16, 2025. Video features the new song "Just a kiss" by @LoganSpaleta.Footage courtesy: Blue Origin

  • 00:58 SpaceX Starship Flight 7 #booster #catch @LoganSpaleta #music #launch #spaceflight #chopsticks

    SpaceX Starship Flight 7 #booster #catch @LoganSpaleta #music #launch #spaceflight #chopsticks

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    SpaceX launched the seventh test flight of the Starship megarocket from Starbase in Texas on Jan. 16, 2025. Starship's Super Heavy booster successfully separated, and returned to Earth and was caught by the "chopsticks" on the launch tower. Video features

  • 09:12 Blastoff! SpaceX launches 22 Starlink satellites from California, nails landing

    Blastoff! SpaceX launches 22 Starlink satellites from California, nails landing

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    A SpaceX Falcon 9 rocket launched 22 Starlink satellites from Vandenberg Space Force Base in California on Feb. 1, 2025 at 6:02 p.m. EST (2302 GMT).The Falcon 9's first stage returned to Earth about eight minutes after liftoff as planned, touching down in

  • 05:35 The Brutal War on Soda: part 0 Snap Crystal Pop! It begins!

    The Brutal War on Soda: part 0 Snap Crystal Pop! It begins!

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    you should donate to THORnews because i am awesome.God bless everyone,https://www.paypal.me/THORnewshttps://venmo.com/TEric-Lewisonhttps://www.patreon.com/thornews

  • 00:30 Pan: Kohoutek 4-55

    Pan: Kohoutek 4-55

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    The swirling, paint-like clouds in the darkness of space in this stunning image seem surreal, like a portal to another world opening up before us. In fact, the subject of this ESA/Hubble Picture of the Week is very real. We are seeing vast clouds of ionis

  • 09:03 Blastoff! SpaceX launches first Starlink batch of 2025, nails landing

    Blastoff! SpaceX launches first Starlink batch of 2025, nails landing

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    A SpaceX Falcon 9 rocket launched 24 Starlink satellites from Cape Canaveral Space Force Station on Jan. 6, 2025 at 3:43 p.m ET (2043 GMT). It was the first Starlink satellite launch of 2025. The Falcon 9's first stage returned to Earth about eight minute

  • 00:30 Pan: NGC 1559

    Pan: NGC 1559

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    The magnificent galaxy featured in this Hubble Picture of the Week is NGC 1559. It is a barred spiral galaxy located in the constellation Reticulum near the Large Magellanic Cloud, but much more distant at approximately 35 million light-years from Earth.

  • 00:30 Pan: NGC 1672

    Pan: NGC 1672

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    This Hubble Picture of the week features NGC 1672, a barred spiral galaxy located 49 million light-years from Earth in the constellation Dorado. This galaxy is a multi-talented light show, showing off an impressive array of different celestial lights. Lik

  • 01:04 SpaceX fires up flight 7 Starship in preparation for launch

    SpaceX fires up flight 7 Starship in preparation for launch

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    SpaceX conducted a static fire test of their flight 7 Starship on Dec. 15, 2024. The test occurred at Starbase in south Texas.Credit: Space.com | footage courtesy: SpaceX | edited by [Steve Spaleta](https://x.com/stevespaleta)

  • 01:30 SpaceX aborts launch of 'MicroGEO' satellites at T-0 seconds

    SpaceX aborts launch of 'MicroGEO' satellites at T-0 seconds

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    The launch of a SpaceX Falcon 9 rocket carrying four "MicroGEO" satellites, built by San Francisco company Astranis, was aborted right before liftoff from Cape Canaveral Space Force Station at midnight EST (0500 GMT). According to Space.com, an unspecifie

  • 03:41 NASA Astronauts 2024 Reverse Fan Mail

    NASA Astronauts 2024 Reverse Fan Mail

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    Reverse fan mail! ???? We surprised unsuspecting @NASA_Johnson staff with heartfelt letters and a big reveal to show our gratitude. ???? They are the true heart of every mission, and we couldn’t do it without them. ❤️

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