The first color movies from NASA’s New Horizons mission show Pluto and its largest moon, Charon, and the complex orbital dance of the two bodies, known as a double planet. “It’s exciting to see Pluto ...

Recent images taken by the Hubble Space Telescope show that Pluto?s three moons are the same color, lending support to the theory that they were formed by a single, giant collision 4.6 billion years ...

Is a sun a star or a planet? While science now agrees the sun is a star, new telescopes may soon challenge how we define ...

New color images from NASA’s New Horizons spacecraft show two very different faces of the mysterious dwarf planet, one with a series of intriguing spots along the equator that are evenly spaced. Each ...

From Pluto's distance of more than 3 billion miles, the Sun shrinks to a tiny but brilliant point of light. It's bright enough to cast shadows and light the landscape similar to what we'd see on Earth ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. A composite of enhanced color images of Pluto and Charon taken by NASA's New Horizons spacecraft ...

Once the quirky underdog of our solar system, Pluto held planetary status until 2006, when it got a cosmic demotion that still stings space fans. Discovered in 1930, Pluto was the ninth planet for ...

You know what a planet is, right? A big round thing that orbits a star. Uh, not so fast. You know what a planet is, right? A big round thing that orbits a star. Uh, not so fast. The surprisingly ...

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 ...