This website, containing information from the Sloan Digital Sky Survey, provides projects and activities for advanced astronomy students. In this particular one, the user retraces Edwin Hubble's steps to discover that...

This site from the Exploratorium provides information on telescopes and observatories such as the Hubble Space Telescope that are being used to study spectra from space. Gamma-ray, x-ray, ultraviolet, and infrared...

The HubbleSite includes news, lessons, activities, and multimedia on the hubble telescope and the work performed by it and its team of scientists. The site includes a large archive of images taken by the telescope,...

This web site contains information on the use of different wavelength filters to determine astronomical information by the Hubbble Space Telescope. The use of color to enhance black and white images is included. The...

This resource covers the general features of Neptune; the surface and interior of Neptune from Hubble Space Telescope and Voyager 2 observations; the rings of Neptune; and the eight moons of Neptune, including Triton and...