Astronomy Web Tool Kit

Phases of the Moon
Kepler's Laws of Planetary Motion
Planetary Atmospheres
Energy Levels and Spectral Lines
Craters and Surface Ages
Density of the Terrestrial Planets
Magnitude Calculator

Free Astronomy Software

Celestia, cosmic 3-D simulator
Google Earth shows the night sky
Google Mars: explore the Red Planet
Stellarium, a planetarium program
Orbiter, space flight simulator
Heavens Above: track a satellite

Observatories in Arizona

Kitt Peak National Observatory
(west of Tucson, open to visitors)
Lowell Observatory
(Flagstaff, open to visitors)
Mt. Graham International Observatory
(near Safford, guided tours)
Fred Lawrence Whipple Observatory
(south of Tucson, guided tours)
Discovery Channel Telescope
(near Flagstaff, under construction)

Arizona Science Centers & Planetariums

Dorrance Planetarium
      at Arizona Science Center
Challenger Space Center (Peoria, AZ)
UofA Flandrau Science Center & Planetarium

Local Astronomy Clubs

East Valley Astronomy Club
Saguaro Astronomy Club
Phoenix Astronomical Society

Other Astronomy Sites in the Southwest

Meteor Crater (east of Winslow, AZ)
Very Large Array (western New Mexico, on US Highway 60)

Astronomy News and What's Up?

Space News at Live Science
Near-Earth weather at NASA Space Weather
Night-time forecast at Clear Sky Clock
Sky & Telescope's Sky at a Glance

Astronomy Image Archives

Astronomy Picture of the Day
NASA Planetary Photojournal
NASA Human Spaceflight Gallery
Hubble Space Telescope Gallery
Hubble Heritage Project
NASA Image Exchange
NOAO Image Gallery

Space-based Observatories

Compton Gamma Ray Observatory
Fermi Space Telescope
Chandra X-Ray Observatory
GALEX: Galaxy Ultraviolet Explorer
Hubble Space Telescope
Kepler Planet-hunting Mission
Spitzer Space Telescope
Herschel Infrared Observatory
Wilkinson Microwave Observatory
Planck Microwave Observatory

Missions to the Solar System

Solar and Heliospheric Observatory (SOHO)
MESSENGER to Mercury (arrival 2011)
Magellan at Venus (1989 - 1994)
Venus Express (arrived May 2006)
Lunar Recon. Orbiter (arrived June 2009)
LCROSS Impactor (arrives October 2009)
Mars Global Surveyor (1997 - 2006)
2001 Mars Odyssey (arrived October 2001)
Mars Express (arrived December 2003)
Mars Exploration Rovers (arr. January 2004)
Mars Recon. Orbiter (arr. March 2006)
Mars Phoenix Lander (arrived May 2008)
Dawn to Vesta and Ceres (arrival 2011)
Galileo at Jupiter (1995 - 2003)
Cassini at Saturn (arrived July 2004)
New Horizons to Pluto (arrival 2015)
The Voyagers to outer Solar System (1977 - ?)

Chronological List Of All Missions (1957-?)