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

For decades, we believed there were nine planets in our solar system—until Pluto was reclassified in 2006. But what if ...

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

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

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

For decades, Pluto was celebrated as the ninth planet of our solar system. However, in 2006, the International Astronomical Union (IAU) redefined what constitutes a planet, leading to Pluto’s ...

Charon is unusual because it is the largest moon in the solar system compared with its parent body. In fact, Charon and Pluto are so similar in size that they are considered a double dwarf planet ...

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

However, this year a powerful new telescope is coming online that could prove once and for all that there really is a ninth planet in our Solar System. The same year that Pluto was ignominiously ...

This provides another piece of the puzzle to understand how planets and ... Pluto-Charon Formation Scenario ... a clearer picture of how the outer solar system formed and evolved based on analyses ...

If the solar system held a poetry slam, each planet would present its unique poetic style. Mercury delivers rapid-fire verses ...

The article humorously portrays each planet of the solar system as different types of gym personalities. Jupiter is obsessed ...