Sedna, a distant dwarf planet three-quarters the size of Pluto, is inching toward the brightest star in our sky — and in 2076 ...

The solar wind pushes some of the gas and dust away from the comet, forming those beautiful tails we see. A comet actually ...

At the time of the Triton encounter, Pluto was actually slightly closer to the Sun than Neptune was. But Pluto always maintains a healthy distance from Neptune, because their orbits are synchronized.

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Pluto at Last Nine years after leaving Earth, New Horizons closes in on the last of the Original Nine planets, and whatever lies beyond.

New James Webb Space Telescope data reveal Pluto's high-altitude haze is a key driver of the climate on the dwarf planet, offering clues to Earth's ancient atmosphere.

New data captured by the James Webb Space Telescope has finally given astronomers new clues about how Pluto cools itself.

The first observations of Pluto by NASA's James Webb Space Telescope (JWST) reveal dramatic phenomena on its surface, like seasonal cycles of volatile ice redistribution across its surface, and ...

The haze particles that dominate Pluto’s atmosphere—such as nitrogen, methane, and carbon monoxide—control the atmosphere’s energy balance as the particles are heated and cooled. This phenomenon, ...

HOWETT: Triton's located one billion miles from Pluto. So how did that happen? NARRATOR: Neptune might be the farthest planet from the sun, but it's not the edge of our solar system. Not even close.

Neptune’s largest moon, Triton, and the dwarf planet Pluto may have shared a common origin before being separated in the early solar system, an analysis of their composition suggests. Triton and ...

We also found wind speeds would have to be excessively fast on Pluto to transport either methane or nitrogen ice (which is what Pluto’s dune sediments were hypothesised to be). This calls into ...