Matthew (blayzed93)

Race #445

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Official speed 56.70 wpm (75.13 seconds elapsed during race)
Race Start June 26, 2017 11:35:04pm UTC
Race Finish June 26, 2017 11:36:19pm UTC
Outcome No win (3 of 4)
Opponents 1. jo_mo_ (83.16 wpm)
Accuracy 94.0%
Points 0.00
Text #3622418 (Length: 355 characters)

If an exoplanet happens to transit its star, we can often determine both its mass and its radius, and hence estimate its density and possibly even its composition. More than 200 transiting hot Jupiters have been measured in this way. But when astronomers calculate their densities the numbers they obtain are generally much lower than predicted by theory.