"The Chart of Cosmic Exploration features hand-illustrated renderings of every orbiter, lander, rover, flyby, and impactor to ever successfully slip the surly bonds of Earth's orbit. Plus all of our pretty-cool planets in our pretty-great Solar System.
Astronomers have discovered a massive galaxy made almost entirely of dark matter. Called Dragonfly the galaxy is basically percent dark matter.
Astronomy Picture of the Day for 16 Mar 2014. Two galaxies are squaring off in Corvus and here are the latest pictures. When two galaxies collide, the stars that compose them usually do not. That's because galaxies are mostly empty space and, however bright, stars only take up only a small amount of that space.