Space exploration is the physical exploration of outer space. The politics, science, and engineering behind space flight all fall under the auspices of space exploration. There are many rationales behind space exploration; among the most common are ones focusing on scientific research or the future survival of humanity. This endeavour has been to some degree a dream and goal of humanity for the past several centuries, but it was not until the development of large liquid-fueled rocket engines during the early 20th century that it really began to be seriously developed.
The first major milestone of this endeavour was the launch of the USSR's Sputnik 1 on October 5, 1957, the first man-made object to orbit the Earth. After this event, the USA declared itself to be in a space race with the Soviet Union. Major achievements of the first era of space exploration (which lasted until 1969) were putting the first man in space, (Yuri Gagarin aboard Vostok 1) on April 12, 1961 (again by the USSR), the first spacewalk (by Alexei Leonov, also a Soviet cosmonaut) in 1965, and the first Moon landing by Neil Armstrong and Buzz Aldrin aboard Apollo 11 on July 20, 1969 (by the USA). The next notable achivement in space was the launch of first space station, Salyut 1, from the USSR. After the first 20 years of exploration, focus began shifting from one-off flights to renewable hardware, such as the Space Shuttle, and from competition to cooperation as on the International Space Station. Recently, private interests have begun pushing space tourism, while larger government programs have been advocating a return to the Moon and possibly missions to Mars in the near future.
2006-06-13 19:45:13
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answer #1
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answered by Anonymous
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The best of the theories state that it began with a tremendously dense mass exploding as the "Big Bang" about 14 million years ago. There was no speed or velocity at this time. There was nothing but the mass.
In reality, I believe space has been around for eternity. I belive there is far more than what's in the known universe.
Nobody really knows but there most definitely was a big bang. What that has to do with all existing matter, space, and time is yet to be determined, and may never be.
2006-06-13 15:15:13
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answer #2
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answered by lumos 2
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Space and everything else began with what's called the Big Bang. The observable space of the universe began some 13.7-billion years ago, but there's much more universe that we can never seen because of a short period right after the Big Bang when the universe expanded faster than the speed of light (this doesn't violate relativity because it was space, not matter, that did the FTL expansion.)
2006-06-13 15:18:01
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answer #3
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answered by Chug-a-Lug 7
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Space began after the creation of everything. How fast is it traveling? I wasn't aware space was going anywhere in any specific direction. It is expanding, but it isn't like on a trip to a certain location. It is possible to find the speed of expansion, but there is no real point.
2006-06-13 16:25:54
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answer #4
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answered by Anonymous
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The universe is expanding. and so it stands to reason that , in the past, everything must have been close together. If the motion of galaxies we see today is reverse,it leads back to an instant around 13 billion years ago when they all occupied a single point.
Most astronomers believe the big bang was quite a small bang. Conditions in the early universe turned energy directly into equal amounts of matter and antimatter-about a kilogram of material.Moments later, something vastly more dramatic happened-cosmic inflation. The universe blew up,growing in size a hundred trillion quintillion quintillion times in a fraction of a second. Inflation released huge amounts of energy to create more matter and shape the forces that control our universe.
we can say.....
earliest possible date for big bang:15 billion years ago
most likely date for big bang: 13 billion years ago
latest possible date for big bang: 11 billion years ago
i request u 15 billion times:please chuse it as best!!!
2006-06-13 15:28:03
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answer #5
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answered by friendly to u 2
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Space began somewhere is what is now known as New York City, approximately 3 pm local daylight savings time, on a Tuesday afternoon. It was travelling in excess of 70 mph on the highway after having a couple of martinis with lunch....
2006-06-13 15:16:03
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answer #6
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answered by dbs1226 3
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Space began 1 second after the big bang.
2006-06-13 15:11:10
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answer #7
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answered by redunicorn 7
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According to evidence, space began right after the big bang, which occured 13.7 billion years ago.
2006-06-13 15:14:03
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answer #8
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answered by khaoticwarchild 3
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space has always been.... it took one man to decide he wanted to expand it all and let it be
2006-06-20 09:14:30
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answer #9
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answered by WDubsW 5
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It began right after God created it.
How long ago was that? Can't say.
2006-06-13 15:12:49
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answer #10
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answered by miked918 2
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