Hot Jupiters, giant planets that circle their stars in just a few days, have long defied simple explanations of how planetary systems grow and evolve. A new tidal “clock” hidden in their orbits is now ...

Add Yahoo as a preferred source to see more of our stories on Google. Jupiter's early growth shaped Earth's formation by trapping dust, forming rings, and protecting planets from spiraling into the ...

New research suggests a giant impact may not have been responsible for the formation of Jupiter's core. Most planetary scientists thought that a colossal collision with an early planet containing half ...

We already know a decent amount about how planets form, but moon formation is another process entirely, and one we're not as familiar with. Scientists think they understand how the most important moon ...