Bortle Bounded

Learn the constellations your sky will actually show.

Short guides to the night sky from the Peak District: what's up tonight, how to find it, and how much of it you'll see from a town or a dark site. Every sky shown is a recording of the Bortle Bounded app, drawn from real star data.

Your guide, Tom, is an AI-generated presenter.

Bortle Bounded is on Google Play: try Orion, the Plough and Cassiopeia free, and unlock the whole sky with one payment. No ads, no subscription.

However Bortle bounds you, don't stop looking up. Clear skies.