pasha (pashatoper)

Race #1461

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Official speed 103.41 wpm (41.20 seconds elapsed during race)
Race Start October 26, 2018 12:22:01pm UTC
Race Finish October 26, 2018 12:22:42pm UTC
Outcome Win (1 of 5)
Accuracy 97.0%
Points 99.96
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.