... Callisto's surface shows its age. ... Io's surface is young, shows practically no impact craters, and is continually being repaved by the lava exploding from its many large volcanoes . Stars Without Galaxies . ... Galaxies are made up of stars, but are all stars found within galaxies? ... Last November, while skygazing toward the constellation Taurus, astrophotographer Joe Orman arranged this time exposure to include the lovely Hyades and Pleiades star clusters in the field of his telephoto lens. ...