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)
-
05:36
NASA Artemis 1 mission update - Breaking spaceflight records and upcoming events
Added 92 Views / 0 LikesOrion 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
-
02:27
NASA remembers fallen astronauts on 55th Apollo 1 anniversary
Added 144 Views / 0 LikesNASA's fallen heroes are remembered on the 55th anniversary of the Apollo 1 disaster. Apollo 1 crew: Virgil I. “Gus” Grissom, Edward H. White, and Roger B. ChaffeeChallenger crew: Francis R. "Dick" Scobee, Michael J. Smith, Ellison S. Onizuka, Judith A. R
-
13:48
Alert! Danger to Florida & Hawaii & a NASTY Hurricane Season ahead!
Added 350 Views / 0 LikesWe've got a Tropical Storm that could develop and threaten Hawaii and an area of interest in the Caribbean that could Threaten Florida and the East coast. AND. all signs indicate this could be a NASTY Hurricane season.God bless everyone,TT LEWISON5430 BIR
-
03:08
Newton’s Third Law of Motion Demonstrated in Space
Added 415 Views / 0 Likes“For every action there is an equal and opposite reaction,” according to the Newtonian law. Astronauts Mark Vande Hei and Joe Acaba demonstrate on the International Space Station. -- Watch the Second Law of Motion demonstrated: https://www.space.com/39946
-
00:37
Severe Solar Weather Creates Astonishing Auroras In Abisko National Park | Video
Added 675 Views / 0 LikesSevere solar winds created these awe-inspiring auroras in Abisko National Park in Sweden, captured by Chad Blakley http://lightsoverlapland.com on January 2nd.
-
09:11
SpaceX launches SES O3b mPOWER satellites, nails landing at sea
Added 65 Views / 0 LikesA SpaceX Falcon 9 rocket launched a pair of SES O3b mPower telecommunications satellites from Florida's Cape Canaveral Space Force Station on Nov. 12, 2023. The Falcon 9's first stage came back to Earth for a soft landing on a droneship in the Atlantic Oc
-
06:49
Mississippi & Alabama Tornadoes! & more Severe Weather to Come! + California Aftershocks
Added 279 Views / 0 LikesThe Eclipse energy is lit!God bless everyone,T LEWISON5430 BIRDWOOD RD. #416HOUSTON TEXAS 77096https://www.paypal.me/THORnewshttps://venmo.com/TEric-Lewison$THORnews on CashApphttps://www.patreon.com/thornews
-
02:31
Simulating a New Mission to the Moon
Added 64 Views / 0 LikesWhile designers and engineers develop new spacecraft, astronauts who will fly the missions and the specialists who support their spaceflights get themselves ready the old fashioned way: practice, practice, practice. NASA teams have used simulations to pre
-
03:10
Planets, a great nebula & more in Feb. 2022 skywatching guide
Added 168 Views / 0 LikesJupiter, Venus and the Orion Nebula are great skywatching targets in February 2022. Learn where to see them in the night sky. Night sky: What you can see this month: https://www.space.com/16149-night-sky.htmlBest night sky events this month - stargazing m
-
00:24
2018 NASA iTech Cycle II Energy
Added 448 Views / 0 LikesNASA is collaborating with the U.S. Department of Energy's Advanced Research Projects Agency - Energy (ARPA-E) on a unique competition to identify transformational energy technologies that can improve energy generation, storage & distribution to the benef
-
02:02
2 Supermassive Black Holes To Merge When Galaxies Collide | Video
Added 701 Views / 0 LikesTwo Milky Way-sized spiral galaxies (the NGC 6240 system) will eventually become one elliptical galaxy with a mass of 10 billion Suns harboring one mega-singularity. The merger may touch off huge gravity waves. Read more about the merger here: http://goo.
-
2:03:07
GPS III Space Vehicle 03 Mission Control Audio
Added 321 Views / 0 LikesThis is the vehicle trajectory and mission control audio without any additional commentary. There may be very long periods of silence. For our full hosted webcast, visit https://www.spacex.com/launches/
-
01:08
See Artemis 1 spacecraft about 8,000 miles away, shortly before Earth re-entry
Added 89 Views / 0 LikesSee the Artemis 1 Orion spacecraft and Earth about 1 hour prior to splashdown in this time-lapse. How to watch re-entry and splashdown live: https://www.space.com/nasa-artemis-1-orion-return-earth-previewCredit: NASA | time-lapse by Space.com's Steve Spal
-
17:32
West Coast HEAT wave into Bitcoin Superbowl Pump & Dump? Russia & Ukraine De-Escalation?
Added 124 Views / 0 LikesThere is a mid winter lul in the energy, so i might be a little wacky.God bless everyone,T LEWISON5430 BIRDWOOD RD. #416HOUSTON TEXAS 77096https://www.paypal.me/THORnewshttps://venmo.com/TEric-Lewison$THORnews on CashApphttps://www.patreon.com/thornews
-
02:28
See Jupiter's Great Red Spot in New Views from Hubble
Added 367 Views / 0 LikesNew Hubble Space Telescope imagery of Jupiter's Great Red Spot confirms that it is continuing to shrink. Learn more and See Photos:https://www.space.com/gorgeous-jupiter-mysteries-hubble-photos-videos.htmlCredit: NASA Goddard Space Flight Center