For decades, our solar system was thought to have nine planets, with Pluto considered the smallest and farthest. But in 2006, ...

Scientists had previously believed that no celestial bodies existed in the vast, empty section of space beyond Neptune.

Pluto has become a beloved object in our solar system ever since the International Astronomical Union (IAU) reclassified it from a planet to a dwarf planet back in 2006 – a decision which has ...