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Cosmology

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supermassive black hole

GRAVITATIONAL GUZZLER  The black hole powering the quasar J1342+0928 (illustrated) weighs as much as 800 million suns, but it existed when the universe was just 5 percent of its current age. Scientists aren’t sure how black holes grew so big so early. 

simulation of lumpy universe

UNEVEN TERRAIN Universe simulations that consider general relativity (one shown) may shift knowledge of the cosmos.

colliding neutron stars

BANG, FLASH  Light waves and gravitational waves from a pair of colliding neutron stars reached Earth at almost the same time, ruling out theories about the universe based on predictions that the two kinds of waves might travel at different speeds. 

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