> You cannot send a rocket to space without helium. > You need helium to launch a rocket - like, to push an astronaut into space. Not quite correct. Helium is

> You cannot send a rocket to space without helium. > You need helium to launch a rocket - like, to push an astronaut into space. Not quite correct. Helium is usually used for pressurizing tanks of rockets, but it's not a mandatory gas for this. Korolev's first satellite rocket used nitrogen for pressurization of tanks. Saturn-V upper stage used the components itself for pressurization.