A History of the Prairie Astronomy Club
American Astronomical Society (AAS)
AstroMart
Astroman Cartoons by Dave Scherping
Astronomy Magazine
Astronomy Picture of the Day
Bad Astronomy
Big Bear Solar Observatory
Cassini Mission
Hubble Space Telescope
International Dark Sky Association
Inventory of the PAC Library
Mars 2001 Odyssey Thermal Emission Imaging System
Mars Global Surveyor, Mars Reconnaissance Orbiter
Mars Rovers
NASA JPL
Omaha Astronomical Society
Panhandle Astronomy Club
Platte Valley Astronomical Observers
Ralph Mueller Planetarium - University of Nebraska Lincoln
SPACE.com
Seven Hills Observatory
Sky and Telscope Magazine
Space Environment Center
Space Telescope Electronic Information Service
Star Gazer
StarDate
The Gemini 8 Meter Telescopes
The STScI Digitized Sky Survey