Aquila, a constellation visible from the Northern Hemisphere. The name means "eagle." The Great Rift of the Milky Way (a dark area in the bright band of stars) passes through Aquila. The rift is caused by dark nebulae (clouds of dust in space) that hide the stars behind them. The brightest star in Aquila is Altair, the 12th brightest star in the sky.
Asteroid belts aren't quite the dense fields of gigantic spinning rocks that you may have seen in a "Star Wars" film, but they're still fascinating. In fact, the main asteroid belt may tell us how our entire solar system came into existence.
Sunspots are peculiar dark areas that show up regularly on the surface of the sun -- and often for no reason. What causes them? What effect could these funny little spots have on the Earth?