The methane gas may constitute a rarefied atmosphere, or it may come from erupting plumes on Makemake’s surface.

What's special about Chiron's rings is that they're still forming; this marks the first time astronomers have ever seen a ...

Beyond the familiar planets lies a fascinating frontier filled with icy worlds, mysterious orbits, and cosmic curiosities. These are the dwarf planets—small but mighty members of our solar system that ...

The solar system is composed of the sun, eight major planets, five dwarf planets, over a hundred moons, and countless comets ...

In approximately 5 billion years, the sun will deplete its hydrogen fuel and collapse under its own gravity, becoming a white ...

Full Video- http://www.youtube.com/watch?v=WHNO079G1i8 Pluto, Eris, and the Dwarf Planets of the Outer Solar System Exploring Space Lecture webcast live on Tuesday ...

Astronomers have been actively hunting for a ninth planet in the solar system for almost a decade ... within the Kuiper Belt ...

Our solar system now, once again, officially consists of only eight planets. Although largely debunked, speculation continued ...

Red dwarfs are the most common stars in our galaxy, and understanding how planets form around them is therefore essential.

Astronomers using the Hubble Space Telescope have uncovered the remains of a frozen, Pluto-like world being devoured by a distant white dwarf star.

The newly discovered world is called GJ 251c and it is a super-Earth orbiting a red dwarf star less than 20 light-years away.

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 ...