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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)

 

  • 00:30 New Pan Video: NGC 2283

    Pan Video: NGC 2283

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    The target of today’s NASA/ESA/CSA James Webb Space Telescope Picture of the Month is the spiral galaxy NGC 2283. This galaxy resides roughly 45 million light-years away in the constellation Canis Major. Classified as a barred spiral galaxy, NGC 2283’s ce

  • 00:30 New Pan: SN 2022aajn

    Pan: SN 2022aajn

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    Other than the announcement of its discovery in November 2022, SN 2022aajn has never been the subject of published research. Why, then, would Hubble observe this supernova? SN 2022aajn is what’s known as a Type Ia supernova, which results from the explosi

  • 00:30 New Pan: Tarantula Nebula

    Pan: Tarantula Nebula

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    The Universe is a dusty place, as this NASA/ESA Hubble Space Telescope Picture of the Week shows. Featured in this image are swirling clouds of gas and dust near the Tarantula Nebula in the Large Magellanic Cloud. About 160 000 light-years away in the con

  • 00:30 New Pan: UGC 5460

    Pan: UGC 5460

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    The sparkling spiral galaxy gracing this NASA/ESA Hubble Space Telescope Picture of the Week is UGC 5460, which sits about 60 million light-years away in the constellation Ursa Major. This image combines four different wavelengths of light to reveal UGC 5

  • 08:06 New Unprecedented Double Pink Highest Tornado & Flood Risk today & endless* Storms!

    Unprecedented Double Pink Highest Tornado & Flood Risk today & endless* Storms!

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    stay safe.May God bless everyone,Thttps://www.paypal.me/THORnewshttps://venmo.com/TEric-Lewisonhttps://www.patreon.com/thornews

  • 02:00 New Video tour of Hubble’s panoramic view of the Andromeda Galaxy

    Video tour of Hubble’s panoramic view of the Andromeda Galaxy

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    This video features the largest photomosaic ever assembled from Hubble Space Telescope observations. It is a panoramic view of the neighboring Andromeda galaxy, located 2.5 million light-years away. It took over 10 years to make this vast and colorful por

  • 00:30 New Pan: NGC 337

    Pan: NGC 337

    by Added 7 Views / 0 Likes

    The subject of this NASA/ESA Hubble Space Telescope Picture of the Week is the spiral galaxy NGC 337, located about 60 million light-years away in the constellation Cetus (The Whale).This image combines observations made at two wavelengths, highlighting t

  • 00:30 New Pan Video: HH 30

    Pan Video: HH 30

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    This new NASA/ESA/CSA James Webb Space Telescope Picture of the Month presents HH 30 in unprecedented resolution. This target is an edge-on protoplanetary disc that is surrounded by jets and a disc wind, and is located in the dark cloud LDN 1551 in the Ta

  • 00:30 New Pan: HOPS 150 and HOPS 153

    Pan: HOPS 150 and HOPS 153

    by Added 6 Views / 0 Likes

    These protostars get their names from the Herschel Orion Protostar Survey, which was carried out with ESA’s Herschel Space Observatory. The object that can be seen in the upper-right corner of this image is HOPS 150: it’s a binary system, two young protos

  • 00:04 New Transition Video: 2022 and 2023 observations of Wolf-Rayet 140

    Transition Video: 2022 and 2023 observations of Wolf-Rayet 140

    by Added 2 Views / 0 Likes

    This video alternates between two James Webb Space Telescope observations of Wolf-Rayet 140, a two-star system that has sent out more than 17 shells of dust over 130 years. Mid-infrared-light observations highlight them with excellent clarity.By comparing

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