But then scientists at the International Astronomical Union decided Pluto didn’t quite make the cut, it lacked the ...

Jupiter is the largest planet in the solar system. It's about 11 times wider than Earth with an equatorial diameter of 88,846 ...

Four of Earth’s neighbors are about to appear in a planetary alignment. Those four planets — Mercury, Venus, Neptune and ...

Prepare for a battle of wills! On April 23, the sun will square Pluto, bringing intensity and friction to themes surrounding ...