I use Tetra Gun Grease. I don't know if it's rated for use on Venus or the moons of Saturn. It works fine for my needs. I've also used PJ1 Black Label chain lube too. It actually does quite well. Flows into place and stays put. For extended storage, Maxima Chain Wax is essentially Cosmolene with a few extra ingredients.
I wouldn't get to deep into the weeds on this grease thing.
MSgt, USAF, Retired
NRA Life Member
The hardest thing to explain is the glaringly evident which everybody had decided not to see. - Ayn Rand