The annual event celebrates the discovery of the little planet with a big heart and other scientific advances at Flagstaff, ...

Whether Pluto is officially a planet is the least interesting thing about the runt of the solar system, astronomers will tell you 95 years after the discovery of the fascinating and sometimes ...

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

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

They did, and the discovery of Planet X was announced on March 13, 1930. An 11-year-old English schoolgirl, Venetia Burney, suggested the name Pluto, the god of the underworld. Tombaugh’s ...

Why is Pluto no longer a planet? Discover the real reason behind Pluto’s reclassification as a dwarf planet and the science that led to this change.

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

Venus in Aries sextile Pluto in Aquarius is sexy and intense and could ignite a change that’s as thrilling as it is ...

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

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

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

What planetary treat is happening in the night sky over California and the rest of the Northern Hemisphere How to see planets with the naked eye Why Pluto isn't part of the 2025 - or any other ...