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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)

 

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    Zooming into NGC 346

    by Shubnigg Added 88 Views / 0 Likes

    This video takes the viewer on a journey to NGC 346, one of the most dynamic star-forming regions in nearby galaxies, as seen by the NASA/ESA/CSA James Webb Space Telescope.NCG 346 is located in the Small Magellanic Cloud (SMC), a dwarf galaxy close to ou

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    by Shubnigg Added 301 Views / 0 Likes

    This video takes the viewer from the region around the Serpens Nebula to the young star HBC 672. This star is known by its nickname of Bat Shadow because of its wing-like shadow feature. The NASA/ESA Hubble Space Telescope has now observed a curious “flap

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    by Shubnigg Added 408 Views / 0 Likes

    This video zooms into one of the most photogenic examples of the many turbulent stellar nurseries the NASA/ESA Hubble Space Telescope has observed during its 30-year lifetime. The portrait features the giant nebula NGC 2014 and its neighbour NGC 2020 whic

  • 00:51 Zooming into the galaxy cluster A1758N

    Zooming into the galaxy cluster A1758N

    by Shubnigg Added 568 Views / 0 Likes

    Zooming into the galaxy cluster A1758N

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    by Shubnigg Added 205 Views / 0 Likes

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    by Shubnigg Added 636 Views / 0 Likes

    Zooming on HH 24

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    Zooming on the star cluster Terzan

    by Shubnigg Added 591 Views / 0 Likes

    Zooming on the star cluster Terzan

  • 00:51 Zooming onto the galaxies NGC 1512 and NGC 1510

    Zooming onto the galaxies NGC 1512 and NGC 1510

    by Shubnigg Added 485 Views / 0 Likes

    Zooming onto the galaxies NGC 1512 and NGC 1510

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    Zooming onto the galaxy NGC 4889

    by Shubnigg Added 608 Views / 0 Likes

    Zooming onto the galaxy NGC 4889

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    by Shubnigg Added 345 Views / 0 Likes

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  • 00:51 Zooming-in to NGC 6302

    Zooming-in to NGC 6302

    by Shubnigg Added 417 Views / 0 Likes

    This video zooms into the planetary nebula NGC 6302, commonly known as the Butterfly Nebula. NGC 6302 lies within our Milky Way galaxy, roughly 3800 light-years away in the constellation of Scorpius. The glowing gas was once the star's outer layers, but h

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    by Shubnigg Added 371 Views / 0 Likes

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    ZUMA Mission

    by shub Added 557 Views / 0 Likes

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    by Shubnigg Added 136 Views / 0 Likes

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    by Shubnigg Added 233 Views / 0 Likes

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    ‘Bigger Than Chelyabinsk’ Asteroid To Skim By Earth | Orbit Animation

    by Shubnigg Added 695 Views / 0 Likes

    ‘Bigger Than Chelyabinsk’ Asteroid To Skim By Earth | Orbit Animation

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    ‘Bomb Cyclone’ Winter Storm Seen from Space

    by Shubnigg Added 624 Views / 0 Likes

    ‘Bomb Cyclone’ Winter Storm Seen from Space

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    ‘Campfires’ seen on Sun in closest images yet

    by Shubnigg Added 269 Views / 0 Likes

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    by Shubnigg Added 392 Views / 0 Likes

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    by Shubnigg Added 474 Views / 0 Likes

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