μspel, or muspel, is a Julia package for radiative transfer in stellar atmospheres. It is named after Muspelheim, the realm of fire in Norse mythology. Muspelheim, or muspel, is a hot and glowing land of fire, in some ways perhaps akin to the glowing atmospheres of stars.

μspel is still under development, and the API is subject to change. Documentation is currently limited to that generated from docstrings.