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Extrasolar planets

Larger than they ought to be


The finding that some gas-giant exoplanets are much larger than theory predicts has been boggling astronomers' minds. Planetary heating caused by gravitational tidal interactions might be a piece of the puzzle.

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Figure 1: Planets much 'lighter' than water.


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Gu, PG. Larger than they ought to be. Nature 465, 300–301 (2010).

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