Amateur Astronomy Tools and Resources
Online Tools
Hosted here
Other online tools
Calculators
Information databases
Image databases
Resources
Free star charts / maps
Free books on astronomy
Free software
General websites, forums and information resources
- CloudyNights, usually referred to simply as "CN". Most famous are the forums on CloudyNights for everything related to amateur astronomy.
Visual deep-sky observing resources
Astrophotography resources
Amateur Telescope Making resources
Telescope Optics
Have any more resources to add here? Tell us on the Telegram group.