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typeracer

Pit Stop
Racer Pro Typer (giantbox)
Race Number 138
Date Sat, 4 Mar 2017 13:20:03
Speed 44 WPM Try to beat?
Accuracy 86%
Rank 3rd place (out of 5)
Opponents tonaxd (2nd place) zackgan (1st place)

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)