Dark-Sky Site Finder
Interactive light-pollution maps with driving directions, Bortle class estimates, and moon-phase overlays for the night you're planning.
Open the mapPractical guides, planning tools, and field-tested tips for amateur astronomers — from your first look at the Moon to tracking the next great comet. No telescope required to begin.
Whether you're stepping outside with nothing but your eyes or running a backyard observatory, these are the resources we reach for first. Each one is built around a single observing question.
Interactive light-pollution maps with driving directions, Bortle class estimates, and moon-phase overlays for the night you're planning.
Open the mapMonth-by-month lunar phases with twilight times, eclipse windows, and a "best deep-sky nights" filter so you know exactly when to head out.
View the calendarA season-by-season walking tour of 24 constellations, with star-hop diagrams and the mythology behind each figure so the sky starts to feel like a place you know.
Start the tourCollimation steps, finder-scope alignment, eyepiece selection by target type, and a 10-minute pre-session routine that prevents 90% of common frustrations.
Get the checklistLive activity curves, peak-hour predictions, and radiant positions for every annual shower — plus a "driving distance" planner for the Perseids and Geminids.
See the forecastPrintable and digital log sheets for sketching deep-sky objects, recording variable-star estimates, and tracking which Messier targets you've bagged this year.
Download templatesA repeatable workflow used by amateur astronomers at every experience level. Adapt the timings to your local sunset and you have a session you can run tonight.
Confirm sunset, astronomical twilight, and moonrise times. Aim for at least 90 minutes of true darkness before you leave the house.
Choose one easy anchor object (the Moon, Jupiter, Orion Nebula) and one stretch goal. Limiting choice keeps the night relaxed and unhurried.
Get to your site 30 minutes before astronomical twilight ends. Set up gear in blue light, let your eyes adapt, and let the sky come to you.
Even three lines — time, conditions, what stood out — turn a single evening into a year of progress you can look back on.
We don't summarize press releases. Every guide on this page was tested under real skies by people who keep a telescope in the trunk of their car.
Observing logs from the past decade — annotated, indexed by sky region, and searchable by the equipment that produced them.
That's the median time our contributors spend outside each month. The advice you'll read here isn't theoretical — it's field-season-tested.
All observing tools, templates, and written guides stay free. Astronomy gets better when more people are looking up, not less.
Messages we get back from people who started with a single guide and a single evening.
I followed the constellation tour with my kids on a Tuesday in October. By the end of the night my eight-year-old was pointing out Cassiopeia on her own. We've gone out every clear night since.
The dark-sky site finder finally got me out of the city. Forty minutes from my apartment and I'm at Bortle 3. I didn't know that existed within driving distance.
Pair these observing guides with our long-form articles and mission briefings to see the same sky from a different angle — historical, scientific, and human.