Kim Jong-il (a9088391)

Race #38495

View Pit Stop page for race #38495 by a9088391Ghost race

View profile for Kim Jong-il (a9088391)

Official speed 62.69 wpm (67.95 seconds elapsed during race)
Race Start October 5, 2017 12:33:15pm UTC
Race Finish October 5, 2017 12:34:23pm UTC
Outcome No win (2 of 4)
Opponents 1. timjeffery44 (64.64 wpm)
Accuracy 97.0%
Points 60.60
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.