Scientists at NASA for the first time have been able to observe the make up of Pluto and other small and icy celestial bodies ...

Mercury would be the gossip, Venus the social butterfly, and Earth the over-eager colleague. Mars would be excessively compe ...

Mercury is the most prone to divulging secrets, doing so swiftly and without discretion. Jupiter and Mars also struggle to ...

Pluto isn't alone—it's part of the Kuiper Belt with possibly hundreds of other planet-sized objects. Because Pluto hasn't ...

According to a recent YouGov poll, 35% of Americans think Pluto is not a planet. But they are all wrong—kind of. To get to ...

For decades, Pluto was celebrated as the ninth planet of our solar system. However, in 2006, the International Astronomical ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

Venus, Mars, Jupiter, Saturn, Uranus, and Neptune will align for our viewing ... nine if you count dwarf power planet Pluto. Because we live on Earth, the max number of planets we can see from ...

The universe's unexplained phenomena, such as mysterious signals and invisible matter, challenge scientists to uncover deep cosmic secrets.

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

Take advantage of a special 6-7 planet alignment from Earth's perspective. Planets 'line up' in the skies over California in ...