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Pluto's eccentric orbit periodically brings it closer to the Sun than Neptune, but a stable orbital resonance prevents them from colliding. Pluto has five known moons: Charon, the largest, …

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Jan 1, 2026 · Pluto’s mean distance from the Sun, about 5.9 billion km (3.7 billion miles or 39.5 astronomical units), gives it an orbit larger than that of the outermost planet, Neptune.

Apr 29, 2025 · Pluto's largest moon, Charon, is about half the size of Pluto, making it the largest known moon relative to its parent planet in our solar system. Pluto's other moons are: Styx, …

Pluto's surface is composed of a mixture of frozen nitrogen, methane, and carbon monoxide ices. The dwarf planet also has polar caps and regions of frozen methane and nitrogen.

Dec 3, 2024 · Pluto's atmosphere is thin and reaches a high altitude due to the dwarf planet's low gravity, which is only about 6% as strong as Earth's. The atmosphere is comprised of nitrogen …

In 2015, New Horizons spotted a heart-shaped feature on Pluto’s surface, poking out from a sea of reddish tar and ice. It’s thought that this nitrogen-rich region, called Tombaugh Regio, may …

Pluto's discovery traces back to the early 20th century when astronomers sought to explain irregularities in the orbits of Uranus and Neptune. Following the successful prediction and …

Pluto was discovered in 1930 by American astronomer, Clyde Tombaugh, the Lowell Observatory said. Here's a look at Pluto's history.