These two planets have much less hydrogen and helium gas.

This is the opposite of breathing in helium gas.

A system using helium gas to absorb some of these vibrations was installed.

Divers who go very deep have a special mixture which has helium gas instead of nitrogen.

The vapor pressure of helium gas is also used but the measurements are difficult.

They noticed that there seemed to be a lot of helium gas in the vicinity.

The beam path can be seen when the electrons are accelerated through a helium (He) gas.

Approximately two-thirds of the craft's lift is provided by helium gas.

The solution is often flash frozen with cold helium gas.

When we're out in space, helium gas will be pumped into the tubing.