About Look Up

Look Up answers one question: is there anything worth going outside for tonight, and when? Type a town or postcode and you get one sentence with a time and a direction, a picture of the real sky, and a cloud forecast, so you can decide in a few seconds.

How it works

The Moon, planets and bright stars are worked out with Astronomy Engine. Space Station passes come from its published orbit (CelesTrak), predicted for your position. Cloud is MET Norway’s hourly forecast, the northern-lights chance comes from NOAA’s Kp forecast and how far north you are, and meteor-shower dates follow the International Meteor Organization. We check our numbers against the US Naval Observatory, Heavens-Above and the IMO.

Every page is free, has no ads and needs no account. Share images are made for each town and night, so when you send one to a friend it shows their sky.

Who made it

Look Up is an independent project made in the UK. It was designed and built with a lot of help from an AI assistant called Fathom, which wrote much of the code under human direction. The sky maths comes from well-tested open-source libraries, not from AI guesses.

Get in touch

Spotted a mistake, want Look Up on your society’s or school’s website, or writing about a sky event? Email hello@lookup-tonight.com. There’s a free widget on the embed page.