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typeracer

Pit Stop
Racer Serjo (serg_k)
Race Number 66
Date Tue, 9 May 2017 18:23:03
Speed 51 WPM Try to beat?
Accuracy 95.2%
Rank 5th place (out of 5)
Opponents boberish (1st place) nestoh (3rd 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)