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typeracer

Pit Stop
Racer chatoonga (21heyicha)
Race Number 22
Date Fri, 24 May 2019 16:01:53
Speed 49 WPM Try to beat?
Accuracy 94.4%
Rank 4th place (out of 4)

Text typed:

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.
— (book) by Eric Chaisson, Steve McMillan (see stats)

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