Sophie (lesophie)

Race #1159

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Official speed 55.99 wpm (76.09 seconds elapsed during race)
Race Start September 23, 2018 10:59:29am UTC
Race Finish September 23, 2018 11:00:45am UTC
Outcome No win (2 of 4)
Accuracy 97.0%
Points 54.12
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.