As astronomers continue discovering unusual worlds beyond our solar system, many say the question that divided scientists in ...

Scientists continue to disagree over how worlds in the solar system should be classified. The argument turns on whether ...

Pluto TV’s refreshed app, built on the same underlying platform as Paramount+, is now reaching Roku players and Roku TVs as part of a wider rollout. The free ad-supported service and the paid ...

Pluto lost its planethood for a very specific reason. Whether or not that’s a good reason depends on who you ask.

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Pluto lost its status as a planet, becoming a dwarf planet. While some, like Neil DeGrasse Tyson, agreed with the move to demote Pluto, which was discovered in 1930, both schoolchildren and many ...

Bold move by officials on Aug. 24, 2006, created astronomical protest.

On the 20th anniversary of Pluto’s infamous demotion, Mike “Pluto Killer” Brown explains why any reversal of that decision would be driven more by nostalgia than science ...

Picture a star, about half the sun's mass shining with a dim red light. Lumbering around it on a 5,000-year orbit is a huge orb called a brown dwarf, which is much heavier than a planet but still not ...

Picture a star, about half the sun’s mass shining with a dim red light. Lumbering around it on a 5,000-year orbit is a huge orb called a brown dwarf, which is much heavier than a planet but still not ...