Sky Data
- This week’s sky at a glance – by Sky & Telescope
- Almanac – Sky event reference by George Gladfelter
- Clear Sky Clock – Astronomer’s forecast for Hidden Valley Observatory
- Astropheric – Advanced weather forecasting for North American astronomers
- Sunrise & Sunset – enter a location in the Search field for other than Rapid City area
- Moonrise & Moonset – enter a location in the Search field for other than Rapid City area
- NASA Space Weather – images, videos and features from America’s space agency
Software / Apps
- Stellarium – desktop and mobile app sky simulation
- SkySafari – mobile app sky simulation
- Simple Moon Phase Calendar – for Android
- Simple Moon Phase Calendar – for iOS
- Aladin Sky Atlas – interactive sky atlas
Miscellaneous
- Printable Planisphere – map of the sky by date and time; 45 degrees North
- Dakota Starry Nights – product reviews and how-to videos
- 3D Printable Models – by NASA
- SpaceX Dragon 2 Flight Simulator – dock with the International Space Station