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 ...

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

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

A four-year-old boy's curiosity about planets has inspired him to write his first children's book. Viaan Mundeja-Gupta, who is fascinated by the cosmos, came up with an imaginative story about making ...

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

Executive order mandates changes on US maps. But will other countries follow suit? Learn more about this renaming.

Summer 2015 was marked by a unique astronomical event, which occurs approximately once in ... the history of astronomy. The ...

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

Lowell Observatory will be hosting the 2025 I Heart Pluto Festival from Feb. 13 to 17, celebrating the planet and its ...

Scientists have discovered a new type of planetary collision called “kiss-and-capture,” where Pluto and proto-Charon briefly ...

Charon is the largest of the five known moons, or natural satellites, of the dwarf planet Pluto. With a diameter of 1,212 kilometres (slightly more than half the diameter of Pluto), Charon is the 12th ...