Stephen Hawking

A Briefer History of Time

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    Lina Pratiwihas quotedlast year
    Instead we use the light-year, which is the distance light travels in a year. In one second, a beam of light will travel 186,000 miles, so a light-year is a very long distance.
    exAspArkhas quoted5 years ago
    Einstein’s 1905 theory of relativity is called special relativity. That is because, though it was very successful in explaining that the speed of light was the same to all observers and in explaining what happens when things move at speeds close to the speed of light, it was inconsistent with the Newtonian theory of gravity.

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