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.
—from Astronomy: A Beginner's Guide to the Universe (7th Edition), a book by Eric Chaisson, Steve McMillan
Active since January 13, 2017.
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Universe | Races | Average WPM | First Race |
---|---|---|---|
Default (English) | 11,944 | 81.51 | January 13, 2017 |
ᗜ Stenography | 6 | 51.02 | July 5, 2023 |
Instant Death Mode | 4 | 100.53 | July 24, 2019 |