Who would have imagined we'd be able to watch the seasons change in the atmosphere of Saturn's large moon Titan? The Cassini spacecraft makes it possible.

In late November, with Jupiter a week away from being closest to Earth for 2012, full moon swept past Jupiter. Enjoy the photos from EarthSky Facebook friends.

The interstellar medium is the stuff between the stars. Made up mostly of hydrogen and helium gas, it contains all the material needed to make stars and planets. It is shaped by stellar winds, dying stars, galactic magnetic fields, and supernova explosions.

Two nearby planetary system have vast comet belts, but no Jupiter-like planets. Are those two things related?

Mars is a beaten and battered planet, according to a research team that recently finished counting and cataloging a staggering 635,000 Martian impact craters.

The sun produced a coronal mass ejection, or CME, today (November 20, 2012). See a NASA spacecraft photo of the CME as it leaves the sun.

Time to look is between 12:30 a.m. and 3 a.m. EST on November 20. That's 5:30 to 8 UTC on November 20. Link for watching online in this post.

Need a web cam for the November 13-14, 2012 total solar eclipse? Check out these links to online viewing.

The sun generates about 400 billion billion megawatts of power and it has done so for five billion years. Nuclear fusion - combining lighter atoms to make heavier one - is what makes it possible.

Black holes are the remnants of very massive stars with gravity so strong that not even light can escape.