The Amazing Space website (amazingspace.org) has been decommissioned. Here, you can find select Amazing Space resources and more highlighting Hubble’s ground-breaking science and awe-inspiring imagery. Even more learning resources can be found at NASA’s Universe of Learning.
A collaboration between Google, NASA, the Space Telescope Science Institute, the European Space Agency, the Digital Sky Survey Consortium, and the Sloan Digital Sky Survey allows users to browse and explore the universe.
"The American Astronomical Society (AAS) is the major organization of professional astronomers in North America. Our mission is to enhance and share humanity's scientific understanding of the universe."
"The Astronomical Almanac is a joint publication of the U.S. Nautical Almanac Office, United States Naval Observatory (USNO), in the United States and Her Majesty's Nautical Almanac Office (HMNAO), United Kingdom Hydrographic Office (UKHO), in the United Kingdom. The printed version contains precise ephemerides of the Sun, Moon, planets, and satellites, data for eclipses and other astronomical phenomena for a given year, and serves as a world-wide standard for such information. The online version extends the printed version by providing data best presented in machine-readable form."