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typeracer

Pit Stop
Racer Mathias (berafoter)
Race Number 707
Date Sun, 26 Feb 2017 12:18:30
Speed 74 WPM Try to beat?
Accuracy 92.5%
Rank 3rd place (out of 5)
Opponents agrus (5th 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)