McMac2 (sjm46)

Race #1508

View Pit Stop page for race #1508 by sjm46Ghost race

View profile for McMac2 (sjm46)

Official speed 98.20 wpm (43.38 seconds elapsed during race)
Race Start July 27, 2017 7:16:45am UTC
Race Finish July 27, 2017 7:17:28am UTC
Outcome Win (1 of 3)
Accuracy 98.0%
Points 94.93
Text #3622418 (Length: 355 characters)

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.