Pluto

Pluto is a dwarf planet in the Kuiper belt, a ring of bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the Sun. It is the largest known trans-Neptunian object by volume, by a small margin, but is slightly less massive than Eris. Like other Kuiper belt objects, Pluto is made primarily of ice and rock and is much smaller than the inner planets. Compared to Earth's moon, Pluto has only one sixth its mass and one third its volume. Pluto has a moderately eccentric and inclined orbit, ranging from 30 to 49 astronomical units from the Sun. Light from the Sun takes 5.5 hours to reach Pluto at its average distance. 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, whose diameter is just over half that of Pluto; Styx; Nix; Kerberos; and Hydra.

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Freezing Ocean Might Not Be Responsible for Cryovolcanic Flows on Pluto’s Moon, Charon

Will Pluto finally answer, ‘Are we alone?’

NASA's Pluto Spacecraft Begins New Mission at the Solar System's Edge

Was Interstellar Object `Oumuamua a Chunk of Exo-Pluto?

The difficult birth of NASA’s Pluto mission

Why is Pluto not a planet?

James Webb schedule for October 3rd to October 10th. Observations of Pluto, Charon, a white dwarf and more incoming

Flying to (Hypothetical) Planet 9: Why visit it, how could we get there, and would it surprise us like Pluto?

16 Years Ago Today Pluto Stopped Being A Planet. Nine Years Later It Become A World

24 year old Clyde Tombaugh won a scholarship at University of Kansas to study astronomy after discovering Pluto. He also discovered several galactic star clusters, hundreds of asteroids, a comet, a cluster of 1,800 galaxies and other observations

Pluto explorer deep dives to the Titanic

Pluto: Everything you need to know about the dwarf planet

Earth Is Safe. The Planets (And Pluto) Won’t Change Orbits And Cause Havoc For At Least 100,000 Years, Say Scientists

Pluto reached opposition (when it appears biggest and brightest for the year) last night. And with a New Moon approaching on July 28, this week is a fantastic time to target the dwarf planet.

Dim Pluto reaches its brightest as the third-quarter moon meets Mars in the night sky

Far beyond Pluto: What's next for NASA's New Horizons probe?

Far beyond Pluto: What's next for NASA's New Horizons probe?

Now is the best time to see Pluto, our beloved dwarf planet

Pluto's moon Charon sports a red polar cap that forms as seasons change

Pluto's moon Charon sports a red polar cap that forms as seasons change