Sky & Telescope Hubble
Hubbles Best Photos at Space Telescope Science Institute
U.S. Naval Observatory
Meyer-Womble Observatory Mt. Evans Denver
Lowell Observatory Flagstaff Arizona
National Solar Observatory
Georgia State University Observatory
Griffith Park Observatory Los Angeles
Mt. Wilson Observatory Los Angeles
Palomar Observatory San Diego
Kitt Peak Observatory Tucson Arizona
National Optical Astronomy Observatory who runs Kitt Peak
Mauna Kea Observatories Hawaii
Maria Mitchell Observatory Nantucket Massachusetts
National Radio Astronomy Observatory Socorro New Mexico
McDonald Observatory Austin Texas
AstroWeb directory of Observatories & Telescopes