In journal files and in EDSM, Axial Tilt is represented in radians, rather than degrees. In-game this is converted to degrees for the info-panel. For example in Sol, Earth has an Axial Tilt of 23.00°, but on EDSM it is shown as 0.4014°. In journal, the Axial Tilt is shown as 0.401426, and if we were to convert this to degrees from radians, we get a value of 23°.
This is a minor issue since Axial Tilt isn't usually relevant to how EDSM is used, but as this applies to every single stellar body presented on the website, I thought it should be noted down.