no one cares (speedyant)

Race #14148

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Official speed 109.37 wpm (38.95 seconds elapsed during race)
Race Start June 22, 2018 9:08:41pm UTC
Race Finish June 22, 2018 9:09:20pm UTC
Outcome Win (1 of 5)
Opponents 2. sputype (103.92 wpm)
3. teeroy (94.59 wpm)
4. pxie7 (81.77 wpm)
Accuracy 98.0%
Points 105.73
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.