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Pit Stop

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Racer Justin (puccie)
Race Number 270
Date Mon, 13 Jan 2020 23:14:04 +0000
Speed 77 WPM Try to beat?
Accuracy 95.0%
Rank 3rd place (out of 4)
Opponents koolienavy (2nd place) montrealtyper (4th 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.
Astronomy: A Beginner's Guide to the Universe (7th Edition) (book) by Eric Chaisson, Steve McMillan (see stats)

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