Star Viewer • Light Pollution • Planning

Astro Tools

Plan better nights out. Pick a location on the map, check sky quality, clouds, star positions, and aurora + shutter speed tools, all in one place.

Live weather + sky data

Star Viewer

Choose a constellation and time (next 7 days). We’ll compute star altitude/azimuth for your selected spot, and show clouds + sky quality.

  • Searchable constellation picker
  • Click map → instant update via HTMX
  • Save favorite observing spots
Open Star Viewer Best for planning targets

Shutter Speed Calculator

Calculate a shutter speed using

  • Focal Length
  • Sensor Size
  • Trailing Pixels
  • Pixel Count
  • Azimuth

Open Shutter Speed Calculator It's completely free.

Aurora Viewer

Pick a location and time (next 7 days). We’ll estimate aurora chances using NOAA SWPC data, plus your local cloud cover.

  • Kp + OVATION-based estimate
  • Cloud cover included
  • Tap-to-check from the map
Open Aurora Viewer Best for aurora nights

Why was this made

I always like taking pictures, but as an inexperianced astronomer, it can sometimes be difficult to find where I should look or go.

So I decided to start building something that shows where to point.

And I also got annoyed by missing high activity aurora events, or finding them out after the fact. So that also drives my intent to add email notifications.