Mundil

Astrophotography apps

The Sun, the Moon and the night sky, made sharp.

Mundil is a family of three apps that turn video and long runs of exposures into one sharp, detailed picture. Free to download, open source.

  • Free to download
  • Open source
  • Windows and Linux
  • macOS coming soon
The Mundil logo: an M between a galaxy and Jupiter, with the Sun above

The name

Mundilfari named his children Sól and Máni after the Sun and the Moon. I named these apps after the people I love, and gave each one its own part of the sky.

Read the story behind the name

The family

Three apps, one for each part of the sky

  • Helia

    The Sun

    Finds the clearest moments in thousands of blurry frames of the Sun and combines them into one sharp image.

  • Annora

    Planets and the Moon

    Follows a planet through thousands of blurred frames and combines the best into one detailed image.

  • Valerian

    The deep sky

    Combines many exposures of a galaxy or nebula into one finished image, with colours matched to real stars.

Under the bonnet

One shared core

Helia, Annora and Valerian are built on the same core, written in Rust. An improvement to it can help all three apps.

  • Registration

    Lines up every frame, so the Sun, a planet or the stars sit in the same place.

  • Frame scoring

    Ranks sharp frames above blurred ones, so the picture is built from the best.

  • Stacking

    Combines the frames you keep into one image with more detail and less noise.

Free to download, open source

Take it, read it, build it

The apps are free software under the GNU General Public Licence, with a few additional terms. Every build you download comes with its source code. Installers for Windows and Linux are on 12hobbies.studio, where you choose what to pay and nothing is a fine amount. Why it is free, in plain words.