And, experts say, the photo could be the first to crowd all eight planets, including Earth, into one frame ... well after the last lineup, Pluto would have been considered a planet.

After all, what does it mean for a planet to "clear its orbit of other debris," which is the single criterion that Pluto ...

Pluto is too far away from Earth to be seen with the naked eye. If you stood on Pluto's surface, the Sun would merely appear to be a very bright star. Although previous images showed that ...

“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 triple star system is sending comets, asteroids and meteors our way, and the number of interstellar objects entering the solar system will rise.

But Pluto and Charon are different from Earth and the Moon, too – they are both smaller (the Moon is 3,475 kilometers across) and much, much colder, made up of rock and ice. When the researchers ...

not just about Pluto, but about the vast realm of icy bodies lurking beyond Neptune, relics of the earliest days of the solar system’s formation. Back on Earth, the planetary scientists who ...

Pictures may enliven us, but other data, such as information about magnetic fields, add a huge amount to our understanding of ...

If a person with a mass of 55kg was to travel to Jupiter or Pluto, the effects of gravity would be very different from those on Earth. Gravity is the pull that a planet exerts towards its centre.