Multiple planets transiting the same star reveal more: period ratios determine stability and dynamics, mutual gravitational interactions
reflect planet masses and orbital shapes, and the fraction of transiting planets obs... ▽ More When an extrasolar planet passes in front of its star (transits), its radius can be measured from the decrease in starlight and its orbital period from the time between transits.
The reason for this is poorly understood, but may
reflect differences in
planet occurrence around the relatively high -
mass stars that... ▽ More We report on the discovery and characterization of the transiting
planet K2 - 39b (EPIC 206247743b).