Astronomers may have just discovered a new class of planets

Located nearly 500 light-years away, ROXs 42Bb is a newly discovered object that astronomers are struggling to define — a unique celestial body that's challenging conventional notions about how planets and stars form. » 1/09/14 2:40pm 1/09/14 2:40pm

The Moon is Younger Than We Thought

The violent history of the Earth's Moon just gave rise to a new mystery. At a Royal Society special meeting today, planetary scientist Rick Carlson announced that the Moon is a few hundred million years younger than we thought. This could change our understanding of how the Earth formed, too. » 9/23/13 12:20pm 9/23/13 12:20pm

Why did all the planet-forming dust around this star disappear in only …

Back in 1983, astronomers discovered a star 450 light-years away that was surrounded by a cloud of dust — a textbook example of a solar system in the making. Now, nearly thirty years later, the cloud has suddenly and mysteriously disappeared. » 7/05/12 4:00pm 7/05/12 4:00pm