UFO Secret and Mysteries
Welcome
Login / Register

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)

 

  • 00:15 New Word Bank: Star

    Word Bank: Star

    by admin Added 11 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_star/Credit:NASA, ESA, and STScI

  • 00:15 New Word Bank: Circumstellar Disk

    Word Bank: Circumstellar Disk

    by admin Added 10 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_circumstellar-disk/Credit:ESA/Hubble, NASA, ESA, and D. Apai and G. Schneider (University of Arizona)

  • 00:15 New wordbank_james-webb-telescope

    wordbank_james-webb-telescope

    by admin Added 9 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_james-webb-telescope/Credit:NASA & ESA

  • 00:15 New Word Bank: Quasar

    Word Bank: Quasar

    by admin Added 11 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_quasar/Credit:ESA/Hubble, NASA, M. Kornmesser

  • 00:15 New Word Bank: Spectograph Spectography

    Word Bank: Spectograph Spectography

    by admin Added 9 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_spectograph-spectography/Credit:ESA/Hubble, John Hutchings (Dominion Astrophysical Observatory), Bruce Woodgate (GSFC/NASA/ESA), Mary Beth Kaiser (Johns Hopkins University), Steve

  • 00:15 New Word Bank: White Dwarf

    Word Bank: White Dwarf

    by admin Added 9 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_white-dwarf/Credit:ESA/Hubble, NASA, ESA, STScI, and G. Bacon (STScI)

  • 00:15 New Word Bank: Planet

    Word Bank: Planet

    by admin Added 9 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_planet/Credit:NASA & ESA

  • 00:15 New Word Bank: Star

    Word Bank: Star

    by admin Added 9 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_star/Credit:NASA & ESA

  • 00:15 New Word Bank: Galaxy

    Word Bank: Galaxy

    by admin Added 9 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_galaxy/Credit:ESA/Hubble, ESA, NASA & L. Calçada

  • 00:15 New Word Bank: Red Giant

    Word Bank: Red Giant

    by admin Added 9 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_red-giant/Credit:NASA & ESA

  • 00:15 New Wordbank: Saturn

    Wordbank: Saturn

    by admin Added 8 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_saturn/Credit:NASA & ESA

  • 00:15 New Word Bank: Dark Matter

    Word Bank: Dark Matter

    by admin Added 9 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_dark-matter/Credit:ESA/Hubble (M. Kornmesser & L. L. Christensen)

  • 00:15 New Word Bank: Supernova

    Word Bank: Supernova

    by admin Added 8 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_supernova/Credit:ESA/Hubble (L. Calçada)

  • 00:15 New Word Bank: Electromagnetic Spectrum

    Word Bank: Electromagnetic Spectrum

    by admin Added 8 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_electromagnetic-spectrum/Credit:NASA & ESA

  • 00:15 New Word Bank: Nebula

    Word Bank: Nebula

    by admin Added 7 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_nebula/Credit:NASA, ESA, and the Hubble Heritage Team (AURA/STScI)

  • 00:15 New Word Bank: Planetary Nebula

    Word Bank: Planetary Nebula

    by admin Added 6 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_planetary-nebula/Credit:ESA/Hubble (M. Kornmesser)

  • 00:30 New One of the Greats

    One of the Greats

    by admin Added 7 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/potw2127a/Credit:ESA/Hubble & NASA, W. Harris Acknowledgement: L. Shatz Music: Andrey Klimkovsky/New Horizons

  • 00:15 New Word Bank: Optical Astronomy

    Word Bank: Optical Astronomy

    by admin Added 7 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_optical-astronomy/Credit:NASA & ESA

  • 00:15 New Word Bank: Open Cluster

    Word Bank: Open Cluster

    by admin Added 2 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_open-cluster/Credit:NASA & ESA

  • 00:15 New Word Bank: Stellar Wind

    Word Bank: Stellar Wind

    by admin Added 2 Views / 0 Likes

    More information and download options: http://esahubble.org/videos/wordbank_stellar-wind/Credit:NASA & ESA

RSS