Amazing seeing someone else know Orbiter, I used to play this SOO much as a kid. I never became a rocket scientist, but if I ever have to pilot a Deltaglider IV through Martian re-entry, I'll be set.
If anyone wants to get started with Orbiter, make sure you grab the Deltaglider IV and Altea Aerospace mods.
Anyone ever heard of Noctis? I haven't played in over 10 years, but it was really something special, doing the procedurally generated exploration sim years before it became a genre, it even had Death Stranding/Dark Souls style semi-multiplayer features.
I've always wanted to make a FOSS remake, just so people could play on platforms that aren't DOS.