Newly discovered three-star system could test Einstein’s theory of General Relativity

A newly discovered system of two white dwarf stars and a superdense pulsar — all packed within a space smaller than the Earth’s orbit around the sun — is enabling astronomers to probe a range of cosmic mysteries, including the very nature of gravity itself.
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Source: http://feeds.sciencedaily.com/~r/sciencedaily/top_news/top_science/~3/_37sqZL3ZpM/140106094718.htm