Mark (piluncraeshgt)

Race #178

View Pit Stop page for race #178 by piluncraeshgtGhost race

View profile for Mark (piluncraeshgt)

Official speed 85.98 wpm (49.55 seconds elapsed during race)
Race Start September 29, 2018 7:31:11pm UTC
Race Finish September 29, 2018 7:32:01pm UTC
Outcome Win (1 of 3)
Accuracy 99.0%
Points 83.11
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.