Rain (u96e8)

Race #5078

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Official speed 52.45 wpm (81.22 seconds elapsed during race)
Race Start June 10, 2018 9:36:09am UTC
Race Finish June 10, 2018 9:37:31am UTC
Outcome No win (2 of 5)
Opponents 3. zederax (47.50 wpm)
Accuracy 94.0%
Points 50.70
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.