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Outer space (or simply space) is the expanse beyond celestial bodies and their atmospheres. It contains ultra-low levels of particle densities, constituting a near-perfect vacuum [1] of predominantly hydrogen and helium plasma, permeated by electromagnetic radiation, cosmic rays, neutrinos, magnetic fields and dust.
On September 12, 2013, NASA announced that Voyager 1 had left the heliosheath and entered interstellar space, although it still remains within the Sun's gravitational sphere of influence. Of the eleven instruments carried on Voyager 1, four are still operational and continue to send back data. It is expected that there will be insufficient ...
Space exploration is the use of astronomy and space technology to explore outer space. [1] While the exploration of space is currently carried out mainly by astronomers with telescopes, its physical exploration is conducted both by uncrewed robotic space probes and human spaceflight. Space exploration, like its classical form astronomy, is one ...
Timeline of space exploration. This is a timeline of space exploration which includes notable achievements, first accomplishments and milestones in humanity's exploration of outer space . This timeline generally does not distinguish achievements by a specific country or private company, as it considers humanity as a whole.
Mae Carol Jemison (born October 17, 1956) is an American engineer, physician, and former NASA astronaut. She became the first African-American woman to travel into space when she served as a mission specialist aboard the Space Shuttle Endeavour in 1992. Jemison joined NASA's astronaut corps in 1987 and was selected to serve for the STS-47 ...
July 31, 1970. Leroy Gordon Cooper Jr.(March 6, 1927 – October 4, 2004) was an American aerospace engineer, test pilot, United States Air Forcepilot, and the youngest of the seven original astronautsin Project Mercury, the first human space program of the United States. Cooper learned to fly as a child, and after service in the United States ...
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