Astronomers have identified a quartet of small rocky planets orbiting Barnard's star - one of our closest stellar neighbors - ...

WASHINGTON >> Astronomers have identified a quartet of small rocky planets orbiting Barnard’s star - one of our closest ...

You thought Saturn's 146 moons were impressive? Think again. The ringed planet's moon count has nearly doubled with the ...

This is the fourth comet Gröller has discovered, but given its extraordinary distance, it was the most exciting find, he says ...