... Sometimes staring into empty space is useful. Pictured above is a region of sky that was picked because it had, well, nothing: no bright stars, no bright galaxies, and no picturesque nebulas. ... The center of our Galaxy is obscured in visible light by dark dust that rotates with the stars in the Galactic Plane. ... Io: Moon Over Jupiter . ... Many Moons . ... Young Star Clusters in an Old Galaxy . ... Elliptical galaxy NGC 4365 is old, probably about 12 billion years old. ...