chris (llamas876)

Race #3566

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Official speed 75.97 wpm (56.07 seconds elapsed during race)
Race Start October 5, 2020 9:40:43pm UTC
Race Finish October 5, 2020 9:41:39pm UTC
Outcome No win (2 of 4)
Opponents 1. man_onatree (104.58 wpm)
Accuracy 96.0%
Points 73.44
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.