The puzzling presence of a certain flavor of methane on Eris and Makemake could be hinting at their warm, watery interiors. When you purchase through links on our site, we may earn an affiliate ...

Active geology—and the large-scale chemistry it can drive—requires significant amounts of heat. Dwarf planets near the far edges of the Solar System, like Pluto and other Kuiper Belt objects, formed ...

For More Webcasts: http://www.nasm.si.edu/webcasts/archive.cfm?siref=YouTube&video=PlutoErisDwarfPlanets Pluto, Eris, and the Dwarf Planets of the Outer Solar System ...

In the solar system’s dark hinterlands, well beyond the orbit of Pluto, lie Eris and Makemake—two primeval, Lilliputian icy worlds that see the sun as a diamantine speck. Each world’s surface ...

Two nearly-identically sized worlds — Eris and Pluto — float distantly in the same frozen region of our outer solar system. A NASA spacecraft has visited Pluto, but not Eris, and each is so distant ...

For eons, our solar system has been a relatively stable environment, with planets orbiting the Sun in predictable paths. However, the vastness of space means that occasionally, other stars come close ...