The ship was moving deeper into the tenuous gases high above Saturn's surface.
Intergalactic space (the space between galaxies) is filled with a tenuous gas of an average density less than one atom per cubic meter.
A momentary flash of violet-white; then *Liar* was embedded in tenuous violet-glowing gas.
It hid behind layer on layer of tenuous gas and dust clouds.
The disk is designed to deflect the tenuous gases in low Earth orbit and thus create an almost perfect gas-free vacuum in its wake.
Its magnetic field expanded, applying subtle pressures to the tenuous gases pushing against the fuselage.
A similar body of very hot and tenuous gas in the halo of any spiral galaxy may also be described by these terms.
As it plows into the tenuous gas of intergalactic space, it emits X-rays.
It was a cloud of gas, infinitely tenuous, reaching half again as far as from Sol to its nearest neighbor-sun.
A tiny bulbous robot floated in the tenuous nebular gas.