A brand new idea on how to fit more fuel in a rocket. (will not work at all)

so, yknow how rockets are fueled by liquid oxygen and kerosene?

thats kinda space inefficient.

so heres the idea:

using all the unused osmium to make a big ass spring-based condensing machine, to condense that liquid oxygen and kerosene into highly unstable metallic oxygen and kerosene.

when it rapidly decondenses inside the rocket's fuel tank, it can provide enough propulsion to skip stage 1 and 2 of the rocket launch entirely.