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WASP-4 Is Accelerating toward the Earth

7 May 2020, 16:00 UTC
WASP-4 Is Accelerating toward the Earth
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L. G. Bouma et al 2020 ApJL 893 L29
The decreasing orbital period of the hot Jupiter WASP-4b is not due to tidal decay, but rather due to the acceleration of the WASP-4 system toward us along our line of sight, possibly caused by a wide companion.

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