The Solar Image Index contains images from different locations in various wavelengths. Contributing observatories include the U.S. Air Force Solar Optical Observing Network and the National Solar Observatory Kitt Peak, Arizona. Full disk and large scale images are available. We've made some animations stringing together daily pictures of the sun, try it, it's very cool. This gallery contains digitized photos of many of the unique research aircraft flown at what is now known as NASA Dryden Flight Research Center at Edwards, California.
All photos are public domain.
Ask An Astronomer From black holes to quasars, or galaxies to globulars there are several sites where you can ask an astronomer your questions. Here are two. Ask an Astronomer at Lick Observatory. Ask an Astronomer at Cornell University. Early Cosmology Tutorial Dr. Brian Monson of the Arkansas School of Math and Science, in Hot Springs, Arkansas has created an Early Cosmology Tutorial.