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

An curved arrow pointing right. Astronomers say they've discovered a ninth planet 200 times farther from the Sun than Earth. Produced by Emmanuel Ocbazghi. Original Reporting by Jessica Orwig.

“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 ...

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.

There could be a ninth planet in our solar system that's lying in wait to be discovered - and no, it's not Pluto. Our solar system has eight planets but in recent years, astronomers have theorised ...

“NINTH PLANET DISCOVERED ON EDGE OF SOLAR SYSTEM; FIRST FOUND IN 84 YEARS,” the New York Times announced in a front-page, all-caps headline in its March 14, 1930 edition, the day after the ...