Atom & Cosmos

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BRILLIANCE  Four new books put Einstein’s general theory of  relativity in historic and scientific context. 

warped spacetime

GETTING A GRIP ON GRAVITY  Einstein's general theory of relativity explains gravity as a distortion of space (or more precisely, spacetime) caused by the presence of matter or energy. A massive object generates a gravitational field by warping the geometry of the surrounding spacetime. 


OLDER THAN IT LOOKS  Some very old stars in the Milky Way, such as HE 0107-5240 (arrow), might be first-generation stars in disguise, a new study suggests.

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