Astronomy Clubs

• Amateur Astronomers Association of Pittsburgh Inc.
• Oil Region Astronomical Society
• Lackawanna Astronomical Society
• Lehigh Valley Amateur Astronomical Society, Inc
• Delaware Valley Amateur Astronomers
• Berks County Amateur Astronomical Society
• The Astronomical Society of Harrisburg
• Central Pennsylvania Observers

Astronomy Images

• AstroBin Image of the Day 

Astronomy for Kids

• Astronomy for Kids

Comets

• Skyhound: This Month’s Comets
• This week’s Comets

Light Pollution

• International Dark Sky Assoc.
• PA Outdoor Lighting Council
• Commission for Dark Skies
• Your Online Guide To Light Pollution

Moon

• IF THE MOON IS ONE PIXEL
• Earth and Moon Viewer
• Named Lunar Formations
• The Hitchhiker’s Guide to the Moon
• Once in a Blue Moon

N.A.S.A.

• NASA Goddard Space Flight Center Homepage
• NASA Images

Online Astronomy Magazines

• Astronomy Magazine
• Sky & Telescope

Satellites, Space Station, Iridium Flare Tracking

• Heavens Above Iridium Flare prediction site.
• Visual Satellite Observer’s Home Page (UK)

Science & Astronomy Websites

• Space.com
•  Universe Today
•  Hubblesite.org

Space Weather

• NOAA – Space Weather Predictor
•  SpaceWeather.com