Dark Sky Finder is a free, no-login map for stargazers. It lays NASA’s satellite picture of Earth at night over a dark world map, so you can see exactly where light pollution sits around you — then finds the nearest certified International Dark Sky Places, plus stargazing viewpoints, observatories and planetariums mapped by the OpenStreetMap community. Allow location access and the map centers on you, ranks everything by distance, and gives you one-tap directions.

It’s built for the night you look up and want more stars: planning a weekend somewhere genuinely dark, picking the best hill within an hour’s drive for tonight’s meteor shower, or checking whether that holiday cottage really has the dark sky the listing promises. Pan or search anywhere in the world — the glow pattern updates wherever you look, and the list re-ranks for the area you’re exploring.

The certified places come from DarkSky International’s official program — more than 270 parks, reserves, sanctuaries and communities worldwide — while the local viewpoints and observatories come from OpenStreetMap, so their coverage varies by region. Where nothing is mapped, the tool says so honestly instead of inventing results.

How to use it

Allow location when prompted. The map recenters on you and ranks the nearest dark-sky places and viewpoints by distance. Prefer not to share location? Search a town or just pan the map.
Read the glow. Bright patches are artificial light washing out the stars; the blacker the map around you, the more sky you’ll actually see. The layers button (top right) toggles the overlay and adjusts its intensity.
Read the markers: colored stars are certified Dark Sky Places — the color tells you the designation — while dots are viewpoints (blue), observatories (teal) and planetariums (rose). Dense areas group into clusters; tap a cluster to zoom in.
Tap any spot to see its designation or type, distance from you, and links — the official DarkSky page for certified places, or the website and OpenStreetMap entry for local spots.
Tap “Directions” to open the spot in Google Maps and navigate there.
Move the map to explore a new area — viewpoint results refresh automatically for wherever you’re looking.

What the light-pollution overlay shows

The overlay is NASA’s VIIRS “Black Marble” imagery — a composite satellite view of Earth’s artificial lights at night. Cities bloom as bright patches, highways trace thin lines between them, and truly dark country stays black. Stargazing is best where the map is darkest: light travels far, so even a modest town can wash out faint stars from many kilometers away.

Astronomers grade night skies on the Bortle scale, from 1 (pristine darkness, the Milky Way casts shadows) to 9 (inner-city glow, only the Moon and planets survive). As a rule of thumb: the darker the overlay where you stand, the lower — and better — your Bortle class. One honest caveat: the lights data is captured at a coarse, city scale, so it stretches when you zoom in close. Use it to compare areas, not individual streets.

The five kinds of certified Dark Sky Place

Dark Sky Park — protected public land with exceptional starry nights and active night-sky programs.
Dark Sky Reserve — a dark core zone surrounded by communities that commit to keeping their lighting sky-friendly.
Dark Sky Sanctuary — the rarest tier: among the most remote and darkest places on Earth.
Dark Sky Community — a town or city that legally protects its night sky through responsible lighting.
Urban Night Sky Place — an urban site that preserves genuine night-sky access despite city surroundings.

Frequently asked questions

Is it free, and do I need an account?

Yes — it’s completely free, with no sign-up, no app to install, and no login. Open the page and it works.

What’s the difference between the stars and the dots?

Star markers are officially certified International Dark Sky Places — sites that earned a designation from DarkSky International for sky quality and lighting policy. Dots are stargazing candidates mapped by the OpenStreetMap community: scenic viewpoints, observatories and planetariums. A certified star is a guarantee of dark-sky commitment; a viewpoint dot is a promising spot to check out.

Where does the data come from?

Three open sources. The nighttime-lights overlay is NASA Earth Observatory VIIRS “Black Marble” satellite imagery. The certified places are DarkSky International’s program list. Viewpoints, observatories and planetariums are © OpenStreetMap contributors, available under the Open Database License, and the dark basemap is © CARTO. Because OpenStreetMap is community-maintained, local coverage keeps improving over time.

Why don’t I see any viewpoints near me?

OpenStreetMap’s viewpoint coverage varies a lot by region. If nothing is mapped where you’re looking, the tool says so and suggests widening the search — and it always shows your nearest certified Dark Sky Places, however far they are, so you’re never left without a real destination. It won’t fake results to fill the gap.

It says my location is “approximate” — why?

If precise GPS isn’t available (location was denied, or your device or network can’t provide a fix), the map falls back to an approximate position derived from your internet connection. That can reflect your provider’s location rather than where you’re standing — especially on a VPN — so it’s clearly labeled. Pan the map or search a place to refine it.

When is the best time to actually see stars?

Pick a clear night close to the new moon — a bright moon washes out dark skies as thoroughly as a city does. Go after astronomical twilight, when the sun is fully below the horizon, and give your eyes 20–30 minutes to adapt to the dark (use a red light if you need one; one glance at a phone screen resets the clock). Then the dark spot you found on this map will show you what you came for.

Does it work on my phone?

Yes — it’s designed mobile-first, with large tap targets and a full-screen map. It works in any modern mobile or desktop browser.