How did those planets form? Could they exist in our universe? Could Star Wars really happen? Stanford Earth experts on planetary formation, processes and habitability discuss the science behind the fictional saga.
A new study suggests a reason why exoplanets rarely grow larger than Neptune: the planet’s magma oceans begin to eat the sky.
New research using data from NASA’s Spitzer Space Telescope has provided a rare glimpse at the surface of a rocky planet outside our solar system. The planet may be similar to Mercury or Earth’s moon, with little to no atmosphere.