Astronomy Tools

Five free tools for choosing a target, planning an observing session, finding darker skies, catching an ISS transit, or working with public Hubble and JWST image data.

Choose a tool

Astrophotography Target Catalogue

Find targets that suit your location and sky, compare imaging difficulty, and get practical starting points for total integration time.

Explore Target Catalogue

Weather Planner

Check the conditions that matter for astronomy and astrophotography before you set up: cloud, visibility, wind, humidity and the observing window.

Open Weather Planner

Dark Sky Finder

Understand light pollution, compare darker observing options and work out where a trip away from local sky glow could make the biggest difference.

Open Dark Sky Finder

ISS Transit Planner

Prepare for solar and lunar International Space Station transits using location coordinates, live tracking guidance and practical capture advice.

Open ISS Transit Planner

Hubble & JWST Image Data Downloader

Search the official MAST archive, find useful public Hubble and JWST FITS files, build a basket and download the files you need for processing.

Open Hubble & JWST Downloader

Not sure where to start?

For a normal observing night, start with the Weather Planner and Dark Sky Finder. If you are planning something more specialised, use the ISS planner or the Hubble/JWST downloader.

New to astronomy or astrophotography? The Resources section collects the beginner guides, setup help and practical checklists in one place.