When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The recent and much-ballyhooed "planetary parade" was an interesting celestial event that likely ...

(Correction: An earlier version of this story misstated how far Pluto is from the sun. The correct number is 3.7 billion miles.) What was discovered in Flagstaff, Arizona, and killed off in Prague? If ...

'Temperamental' stars that brighten and dim over a matter of hours or days may be distorting our view of thousands of distant planets, suggests a new study. Most of the information we have about ...