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Courtesy of Tracey Keifer. Emilio Segre Visual Archives. American Institute of Physics.
It Looks Like Einstein Was Right! Speed of Light and Gravity are Equal!
News story originally written on January 9, 2003
Almost 90 years ago, Albert Einstein was trying to explain how gravity and motion affect time and space. His ideas are very important for scientists today who are trying to understand the Universe. For his theory to work, he had to guess that the speed of gravity was equal to the speed of light. Now, scientists have found that he was right!
In September, 2002, scientists measured the speed of gravity when Jupiter passed in front of a quasar. Jupiter’s gravity made the bright light of the quasar move in an egg shape through the sky. The scientists used the shape of the quasar’s movement to calculate that the speed of gravity is nearly the same as the speed of light!
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