Astronomers declared Pluto a planet in 1930, but its weak gravity couldn’t fully explain Neptune’s orbital wobbles. Scientists kept searching, and by the 1990s they were busy discovering many ...

Persephone would study the shape of Pluto to hunt for signs of a telltale fossil bulge — a "beer belly" of sorts caused when ...

At just two-thirds the diameter of our moon, Pluto has such weak gravity that your baseball could clear the 455-foot-tall Great Pyramid of Giza — with room to spare.

has sufficient mass for its self-gravity to overcome rigid body forces so that it is approximately in hydrostatic equilibrium and assumes a nearly triaxial shape, i.e., m > 1021 kg; ...

On August 24, 2006, Pluto ceased to be considered a planet. A mixture of rock and ice located in the Kuiper Belt, a region of icy objects beyond the orbit of Neptune. This demotion ...

Astronomers have picked up evidence of an Earth-sized world, distinct from the previously hypothesised Planet Nine and Planet ...

On Aug. 24, 2006, the International Astronomical Union voted to downgrade Pluto to a dwarf planet, causing controversy both scientifically and culturally.

Pluto reaches opposition and is ready for those who want to chase it down. Use the biggest scope you've got, or take aim with a photo-capable smartscope.

Modelling Pluto's atmosphere as that of Mars on a very much back of envelope system of e, gravity, ratios and guesstimates, I get a mass of 10-35 teratonnes at perihelion, which is a little ...

Pluto’s gravity is so weak that a man weighing 300 lbs. (136 kg) on Earth would weigh just 20 lbs. (9 kg) on Pluto • Unfortunately, breathing would be impossible.