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2009-12-16 09:48
Before looking at how a star collapses to become a black hole, let’s look at its life. Stars are formed inside vast clouds of gas and dust to drift together to form clumps called proto… Read More
2009-12-13 10:17
The circle of sky is divided into 360 degrees. The “hang ten” sign shows about a 20-degree distance when holding your hand out at arm’s length. This is roughly the length o… Read More
2009-12-13 09:48
Karl Schwarzschild predicted that a Black hole would be formed when a massive star stopped shining and collapsed in on itself. The gravity would be so large that the material would become mo… Read More
2009-12-13 09:45
The French Mathematician Pierre Laplace used Newton’s laws to calculate the size of a body that would stop light from escaping. Karl Schwarzschild calculated at what distance from the… Read More
2009-12-01 17:53
Armed with Einstein’s theories, the German astronomer Karl Schwarzschild (1873-1916) developed the idea of the black hole as we know it today. He did not call it a black hole. This ter… Read More
2009-12-01 17:03
There are two important differences between Laplace’s idea of a dark star and the modern idea of a Black hole. The differences are due to two important discoveries of modern astrophysi… Read More
2009-12-01 16:53
Pierre Laplace (1749-1827), a French mathematician and astronomer, was one of the first people suggest that black holes could exist. As an expert on celestial Mechanics, he knew how the plan… Read More
2009-12-01 16:47
When Sir Isaac Newton devised his Law of universal Gravitation, he also suggested that light was subjected to the pull of gravity. On Earth, light always travels in a straight line, unless i… Read More

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