In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

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

Filmmaker Adam Nemoy helps celebrate the 90th anniversary of Pluto's discovery this month at the 6th annual 'I Heart Pluto' ...

If planets had social media accounts, the solar system would showcase a frenzy of unique personalities. Mercury tweets at ...

Pluto isn't alone—it's part of the Kuiper Belt with possibly hundreds of other planet-sized objects. Because Pluto hasn't achieved gravitational dominance in its region, the International Astronomical ...

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 ...

Is Pluto even a planet? According to Dr. Grundy ... way than if you go to a talk on the early evolution of the solar system," Grundy said. "It really just depends on your focus." ...

This provides another piece of the puzzle to understand how planets and ... Pluto-Charon Formation Scenario ... a clearer picture of how the outer solar system formed and evolved based on analyses ...

And its relationship to Pluto — a world demoted since 2006 from the solar system’s ninth planet to a lowly dwarf planet, in large part due to the discovery of Eris — remains contentious today.

If it’s real, some may question whether something with a mass about three times Pluto’s counts as a planet at all.

High winds, hundreds of lightyears away! Dan Smith shows just how fast one planet's jet stream is moving. 🪐💨 ...