stellarium.org
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Stellarium is a free, open-source planetarium software that renders realistic night skies—stars, planets, constellations, and deep-sky objects—for any date, time, and location. The site offers downloads for multiple platforms and extensive documentation, tutorials, and examples to help you explore and learn astronomy.
More resources on Amateur Astronomy & Skywatching
NightWatch
Terence Dickinson's observing handbook for backyard stargazers, with star charts by season, advice on choosing binoculars and telescopes, and guidance on locating planets, double stars, clusters and nebulae from a dark site.
cloudynights.com
Cloudy Nights is a comprehensive online community for amateur astronomers, offering equipment reviews, user forums, observing reports, and tutorials on telescopes, mounts, accessories, and astrophotography.
Clear Dark Sky
Hourly clear-sky charts for over 1,900 North American observing sites, colour-coding cloud cover, transparency, seeing, darkness, and wind from a numerical weather model. It tells you which nights are worth setting up a telescope.
Heavens-Above
Generates pass predictions for your exact location — ISS, Starlink trains, and thousands of other satellites — alongside interactive sky charts and current positions of planets, comets, and asteroids. Enter coordinates to know when and where to look.
StarDate
Short daily radio feature, running since 1978, that tells listeners which planets, stars, constellations and events to look for in the night sky, with the science, history and skylore behind them. Listeners learn to find and recognise objects visible to the naked eye.
Nebula Photos (Nico Carver)
Tutorial channel walking through complete deep-sky captures start to finish, from untracked camera-and-tripod shots to guided telescope sessions, covering target planning, Bahtinov-mask focusing, narrowband imaging and free-software processing workflows. Deliberately includes no-telescope and no-tracker paths so learners can start before buying anything.