asterism

What is this?

Upload a photo of the night sky and asterism tells you what you were looking at: it names the stars, draws the constellations, and marks the Moon and planets in your frame.

It works out where your camera was pointing from the star pattern alone — no location, no compass, no account.

Works best with an ordinary phone photo of the night sky. Handheld and a little hazy is fine; the more stars you can see, the better it does.