There could be a ninth planet in our solar system ... which is a massive ring of asteroids, comets and dwarf planets that orbit the sun beyond it. In 2004, scientists found Sedna, a potential ...

The cosmos is filled with wonders yet to be discovered. One of the latest mysteries captivating scientists and space enthusiasts alike is the potential discovery of a ninth planet beyond Pluto.

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto turns out to have as much complexity as Mars or Earth, so much so that I ...

Arizona in 1930 and was considered our ninth planet until 2006. The International Astronomical Union reclassified Pluto as a dwarf planet because it does not clear its orbit of other debris.