T-69 says -173 degrees Celsius on the moon. And Cold Sweet 10.

I'm not sure what this means...

in the lower left corner is the temperature from your mod, and in your hand is the device from the ad astra mod

Ok, I see. In world_settings.toml, you can add this dimension and set its temperature to something that is more accurate.

I believe there is a community member working on Ad Astra support that makes the temperatures of the planets more realistic, among other things.