- AccuWeather Astronomical Information
- The Friedman Observatory Clear Sky Chart
- The Friedman Observatory page on Astronomy.net
(a repository of photos of the sky taken at the observatory) - Penn State Astronomy & Astrophysics Department
- NASA Jet Propulsion Laboratory
- Hubble Space Telescope
- Astronomy Picture of the Day
- SpaceWeather.com
- Astronomy Magazine
- Sky & Telescope
- Sky & Telescope: This Week’s Sky at a Glance
