What makes the difference between a near-miss asteroid and a potential hit? Scientists think it might be related to a force called the Yarkovsky effect.
Astronomers have created a new map of the Milky Way that shows that about 30 percent of the stars have traveled a long way from the orbits they were born with.
How you can see the star HD219134, announced last week to have the nearest rocky exoplanet. Plus ... the star's proper motion, captured by an amateur astronomer.
The Dawn spacecraft is now moving to its third mapping orbit. Nothing new on the bright spots yet, but the crater that contains them has a new name: Occator.