Triple star system 'can reveal secrets of gravity'

http://www.bbc.co.uk/news/science-environment-25598051

Quote:

Astronomers have discovered a unique triple star system which could reveal the true nature of gravity. They found a pulsar with two white dwarfs all packed in a space smaller than Earth's orbit of the Sun. The trio's unusually close orbits allow precise measurements of gravity and could resolve difficulties with Einstein's theories.

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