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First of all, it is difficult to prove that some things don't exist. It is not logically or academically reasonable to expect someone to do that. There is one thing, though, which should stand as strong evidence that we have never been visited by
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If you mean re-enter the atmosphere from orbit and land safely, yes, it's possible now. During the research for the U.S. space shuttle, the problem came up of "How do we recover 8 people if we have to get them back to earth, as the largest
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Stephen Hawking had earlier shown that the total horizon area of a collection of black holes always increases with time. The horizon is a boundary defined by lightlike geodesics, it is those light rays that are just barely unable to escape. If
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Sure. The real question is if Newton could have invented Newtonian Mechanics without Galileo and perhaps Kepler. It was Newton, who when asked about his accomplishments said: "If I have seen further, it was because I was standing on the shoulders
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It was the first flight to world's first space station (Salyut 1). The previous mission (Soyuz 10) had failed to dock the station. The cosmonauts of the Soyuz 11 remained on Salyut 1 for 22 days, a new space endurance record at that time. They
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By Megan Pickett Associate professor of physics Lawrence Today magazine, Summer 2007 I arrived at Lawrence University in the fall of 2006 and during that term I taught our introduction to astronomy course, Physics 110. As an astrophysicist, I have
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When Christopher Columbus sailed to the New World in 1492 and proved Earth is a sphere, astronomers started thinking differently about Earth’s place in the universe. For 1,400 years the Ptolemaic system, with Earth at the center of the universe and
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Station completion is tied to shuttle availability since there isn't any other launch vehicle that will lift the heaviest sections like the lab modules and the truss pieces. So, by definition, it should be done by 2010 when the shuttles are
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The universe has no atmosphere and therefore no matter which we call a vacuum so as there is no atmosphere there are no decomposers and hence the bodies will just float in the universe and will not decompose until and unless they any on any alien
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The temperature of the visible "surface" (photosphere) of the sun is simply determined by its color. Incandescent hydrogen is that color at that temperature. This is thought to be about 6,000 Degrees Kelvin for our sun.
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