The sixth planet from the Sun now has a grand total of 274 ... are governed by the International Astronomical Union (IAU).

Meteorites are rocks from space that survive their fiery descent through Earth's atmosphere and reach the ground. More than ...

The IAU also estimates that there could be "more than 100" extra dwarf planets waiting to be found in the outer solar system, all of which could have moons. "Just like the giant planet satellites ...

Sky gazers across the U.S. will have a chance to see an extraordinary celestial event on Friday as all of the planets in our solar system will appear in the evening sky. This phenomenon known as a ...

This is an event sometimes called a “planetary parade,” when four or more planets line up in the sky at once. But on the evening of February 28th, we will be able to see all seven planets in ...