The home page of the National Aeronautics and Space Administration. You will find links to their enormous image collection, information about all the missions and history of NASA, and much information on astronomy, the universe, aeronautics, and technology.
The home page of the Hubble Space Telescope. One of the interesting links on this page is under the Projects tab. Here you can find Hubble's Hidden Treasures which features the top 100 pictures. Here you can also search their archives of the thousands of pictures taken by this telescope.
Some commercial enterprises purport to offer for a fee, services where you can buy stars or name stars after other persons. However, such names are fictitious, have no formal or official validity whatsoever, and are not officially recognized. This guide from the International Astronomical Union explains how stars are actually named.