“Nope, which makes me wonder why it is so much faster in space than in air or water since the denser water conducts it almost 5 times as fast as the thinner air. Must be it uses wormholes...... “
In a medium, speed is not related to density.
The speed is related to pressure and temperature, which are both related to density, so yes, density is related to speed.
Source/ Probably above my school learning from the 50's and 60's - when it comes to sound, we learned that the denser the medium, the faster the sound was transmitted.
Getting up there in years but always looking to pick up another interesting fact.