How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

A recently discovered celestial body is rewriting our knowledge of the Kuiper Belt and maybe challenging the existence of the elusive Planet Nine deep in the cold margins of our solar system ...

Though Pluto has formally been considered a dwarf planet for almost two decades, it still has many lessons left for planetary scientists — including hints about how the solar system formed.

Pluto's status has been a heated debate for decades with arguing over a dwarf planet classification. Here's what international standards say in 2023.

Real Image of Dwarf Planet Pluto? A colorful photo said to show the former planet was circulating on social media.

Once believed to be the ninth planet from the sun, Pluto lost its planet status in 2006 — causing controversy both scientifically and culturally.

Pluto hasn't been a planet for almost 20 years. In the early 2000s, scientists discovered several objects of a similar size to Pluto. So, during the summer of 2006, members of the International ...

Pluto was found on 18 February 1930 by astronomer Clyde Tombaugh while observing the assistant working at the Lowell Observatory in the United States.

Once believed to be the ninth planet from the sun, Pluto lost its planet status in 2006 — causing controversy both scientifically and culturally.