The controversy endures over Pluto's true status, but the solar system underdog continues to capture hearts across the globe.

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

Feb. 18 marks the 95th anniversary of the discovery of our outermost planet-not-planet. Here's what to know about the short ...

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – here’s how to spot the celestial show ...

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 ...