2015 Smackcam (dimmaschool)

Race #9

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Official speed 57.99 wpm (73.46 seconds elapsed during race)
Race Start April 12, 2018 12:49:50pm UTC
Race Finish April 12, 2018 12:51:03pm UTC
Outcome No win (3 of 4)
Opponents 1. dilliocm (58.84 wpm)
Accuracy 92.0%
Points 56.06
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.