Some sunlike stars are "Earth-eaters." As they form, they ingest large amounts of the rocky material from which planets like Earth, Mars and Venus are made.
After a three-year observing campaign of Saturn using the Hubble Space Telescope, scientists have confirmed that auroras on Earth and Saturn have a common origin.
Scientists believe light transformed to matter shortly after the Big Bang. Two UK physicists say they now know how to change light to matter here on Earth.
The planet is about 2,000 times the Earth-sun distance from its star, a record among exoplanets. That means it takes about 80,000 Earth years for the planet to orbit its star.
This supercomputer simulation from NASA shows one of the most violent events in the universe: Two neutron stars ripping each other apart to form black hole.