This was true even in areas with high levels of both radon gas and gamma radiation.

BBC: Radon cancer fears dismissed

There, the so-called greenhouse gas absorbs infrared radiation, and then sends some of that radiation to earth.

NPR: Has the Move to Make Cars Greener Stalled?

This says that the exploding material (whatever it may be) races outwards and collides with interstellar dust and gas, producing radiation.

ECONOMIST: A symphony in gamma major

Cooling problems have resulted in damage to radioactive fuel rods, hydrogen gas explosions, fires and radiation releases.

WSJ: GE Steps Up Aid in Reactor Crisis

Gas clouds in the middle of the galaxy are, everyone agrees, partly ionised: radiation flying through has battered electrons off some of the atoms in the gas.

ECONOMIST: Here be serpents

He saw that there was an analogy between the radiation in the container and a gas: The quanta, he realized, behaved like gas particles.

WSJ: Book Review: Surfaces and Essences

Our star can sometimes despatch big bursts of shortwave and longwave radiation, superfast particles and colossal volumes of charged gas (plasma) in our direction.

BBC: UK 'can cope with solar superstorm'

Gas leaks, and the minuscule push provided by infra-red radiation from the crafts' electricity generators, were ruled out.

ECONOMIST: A space oddity

The new work focuses instead on cold, dense masses of gas that have markedly less random motion, and which emit their radiation in the microwave part of the electromagnetic spectrum.

BBC: Supermassive black hole weighed using new scale

Ordinarily, there should come a point where the pressure from all the radiation emitted by a stellar behemoth pushes back against any further infall of gas and dust.

BBC: Astronomers detect 'monster star'