Queen founding member Brian May is a world-renowned guitarist, songwriter, producer, and performer. Plus, he's an astronomer. Interview here.

The 5,000th EarthSky broadcast was produced and first released in September, 2006. Read more about this big milestone here.

Astronomers studied a pair of brown dwarfs in the direction of the Orion Nebula to learn fundamental properties of eclipsing brown dwarfs.

Kai Lee said, "I think one of the great dilemmas we face is acknowledging this interdependence in a way which also enables us to live our lives. We don't want to be encumbered all the time with thinking about all the indirect consequences of what we're doing in the world. And I think that's a dilemma that we don't even recognize is a dilemma yet ... "

Urbanites soon to outnumber country dwellers

Don't count on forests to keep us cool. Learn more about how trees in the far northern forests have been growing more slowly in the summertime.

Located two billion light-years away, Abell 2218 is an example of a huge galaxy cluster that can bend light, thereby acting as a 'telescope' for astronomers. It works because the gravity of a large mass in space - like a galaxy cluster - bends and focuses the light from galaxies that lie behind it.

There are billions of stars in our Milky Way galaxy - the stars we see at night when we look in a clear dark sky. To our eyes, these stars look as if they're standing still. But they're really moving. One of the nearest 45 stars, called Kapteyn's star, is an example of a high-velocity stars moving in the space near our sun.

B.L. Turner is a professor at Arizona State University. He talks about the history of the biophysical system and the social system as one of a coupled system.

Astronomers discover what might become the smallest solar system yet known. Read more about this tiny solar-system-to-be here with Kevin Luhman.