jse (dragoncityjose)

Race #2167

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Official speed 111.60 wpm (38.17 seconds elapsed during race)
Race Start August 25, 2020 11:19:19pm UTC
Race Finish August 25, 2020 11:19:57pm UTC
Outcome Win (1 of 5)
Opponents 2. okkonishi (87.89 wpm)
Accuracy 96.0%
Points 107.88
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.