.
The Exploratorium - Science, human
perception


Doc G's Information site - Imaging, Telescope, film information
http://www.astronomer.net/drift.htm
IMAGING
http://www.arnierosner.com/ccd/astro/Special_Filters/M1-LPF/m1-lpf.html
NASA/IPAC EXTRAGALACTIC DATABASE
Astronomical
Reference Network
REFNET
Telescope simulator. Learn how to how to estimate the magnitude of a variable star
John Brewster's Meade technical tips
Thousands of astronomy images and books