Venture to the outer edges of the solar system where decades-long missions push the limits of human engineering. From ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. A composite image comparing the relative sizes of our solar system's known dwarf planets, ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. This image of Pluto was made after the New Horizons spacecraft flew past the dwarf planet on July ...

The five dwarf planets recognized by the International Astronomical Union are Pluto, Ceres, Eris, Haumea and Makemake—and these are pictured with 2017 OF201 in a telescope image. Dwarf planets: NASA / ...