When astronomers found a large world farther out than Pluto, it became one of the final nails in the coffin of our ninth ...

According to a recent YouGov poll, 35% of Americans think Pluto is not a planet. But they are all wrong—kind of. To get to ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

It saw the discovery of dwarf planet Eris and how those very observations led to a new way to describe the Solar System and heralded the eventual change of Pluto’s planetary status. On that ...

such as the dwarf planets Eris and Orcus and their respective moons Dysnomia and Vanth. “I’d really like to determine how the initial Pluto-Charon impact can influence whether and how Pluto ...

Pluto may have got romantic to capture its largest ... to the other large Kuiper Belt Objects with large moons, like Eris and Dysnomia, Orcus and Vanth, and the others," Denton explained.

35,091 people played the daily Crossword recently. Can you solve it faster than others?35,091 people played the daily Crossword recently. Can you solve it faster than others?

is a disc-shaped region beyond the orbit of Neptune’s in the outer solar system—50 Earth-sun distances—that’s home to dwarf planets like Pluto, Makemake and Eris. It’s also thought to be ...

Although Seeing in the Dark doesn't directly discuss Pluto, it does celebrate the joy of observing planets. Viewers who watch the show may wonder what happened to Pluto in 2006 and whether any of ...