Galaxies, Science How can a galaxy be over 27 billion light-years from Earth if the universe is only about 13 billion years old?
Milky Way How far from Earth would a space camera have to be to obtain a full image of our own Milky Way galaxy?
Science Since the Milky Way is a flat disk, it should appear as a straight line across the sky. However, in photos such as on pages 50–51 of the April issue, it is a curved arc. Why?
Robotic Spaceflight What will happen to Hubble once the James Webb Space Telescope becomes operational?
Science Saturn’s moons (Enceladus, for example) are heated by gravitational flexing. How does this process work?
