However, not all of those celestial bodies survived, and a new analysis of a the meteorite NWA 15915 shows that it likely originated from a world that was similar to Mercury in its composition—but not ...

The IAU also estimates that there could be "more than 100" extra dwarf planets waiting to be found in the outer solar system, all of which could have moons. "Just like the giant planet satellites ...

Out past Neptune are countless small icy and rocky bodies called Trans-Neptunian Objects (TNOs), and many of these have moons ...

Saturn was already the reigning champion in the moon department. Now, with 274, Saturn has more moons than all the other ...

The relative quantities of volatile gases like methane and ethane can reveal key details about distant Kuiper Belt objects.

The ringed gas giant Saturn has officially replaced Jupiter as the planet in our solar system with the most moons. The ...

“New Horizons shattered a major paradigm of planetary science,” says Alan Stern, the mission’s principal investigator. “Pluto turns out to have as much complexity as Mars or Earth, so much so that I ...

This Hubble image reveals the first moon ever discovered around the dwarf planet Makemake. The tiny satellite, located just above Makemake in this image, is barely visible because it is almost ...

As of now, the largest known moon in relation to its parent is Charon, the largest moon of the dwarf planet Pluto. Unique among the many strange moons of the solar system, Charon is approximately ...

The moon phase and weather pattern will also boost ... You may recall that Pluto was reclassified as a dwarf planet in 2006 by the International Astronomical Union. Depending on weather conditions ...

Clyde Tombaugh discovered Pluto in 1930 at Lowell Observatory in Flagstaff. Here's how Pluto won - and lost - its planetary status.