Observatories and Telescopes

• Selected ground based facilities
  
• Observatories in orbit
  
• World's largest telescopes
  

Space Exploration

• Mars Rovers
  
• Cassini-Huygens Mission to Saturn and Titan
  
• New Horizons Pluto-Kuiper Belt Mission
  
• Spaceflight Now
  

Images and Information

• Hubble Heritage Project
  
• Space Telescope Science Institute (Hubble Space Telescope image catalog)
  
• Jet Propulsion Laboratory
  
• Students for the Exploration and Development of Space
  

The Sky

• Sky and Telescope
  
• CalSKY - An Astronomical Calendar
  
• NASA's Watch the Skies
• Messier Catalog
  

Free Sky and Space Simulation Software

• Stellarium - Planetarium
  
• Celestia - 3D Space Simulator
  
• XEphem - Software Ephemeris
• Partiview - Digital Universe

The Solar System

• The Nine Planets
  

History of Astronomy

• General topics ... links on the web
  

Archeoastronomy

• Center for Archeoastronomy
  

Casa Grande

• National Park Service
  

Chichen Itza

• Maya Adventure

Stonehenge

• Astronomy at Stonehenge

Orbits and gravitation

• Orbits and Properties of the Planets

Sunspots and solar flares

• NASA/Goddard Space Flight Center
• NOAA Spaceweather
• Big Bear Solar Observatory
• Solar Data Analysis Center

General interest

• Astronomy Picture of the Day
• NASA Headlines
• International Space Station
• Stephen Hawking's Universe
• How stuff works
• Astrogeology
• Space Telescope Science Institute (Hubble Space Telescope images)
• Jet Propulsion Laboratory information/images

Astronomy in Louisville

• Moore Observatory
• Rauch Planetarium
• Louisville Astronomical Society

Careers in Astronomy

• American Astronomical Society
• Preparation and Employment