The lightning in the upper atmosphere burns the gases in its path.
They were hovering in Earth's upper atmosphere, at the permitted limit.
Because we are leaving one of the undiscovered conditions of the upper atmosphere that disturbs the sunlight.
Not impossibly the process of the earth's upper atmosphere in maintaining a terrestrial equilibrium may afford some clue.
Second, the upper atmosphere of Eisberg was pretty much pure hydrogen, which is somewhat easier to ionize than oxygen or nitrogen.
Meeting the rarefied gases of the earth's upper atmosphere, they illuminate them as electric discharges illuminate a vacuum tube.
They tell us that it is caused by the arrest of the energy of the sunbeam by the clouds and vapor in the upper atmosphere.
Or had the Throgs tried to blast the Terran ship in the upper atmosphere, crippling it, making this a forced landing?
Would she sail through the upper atmosphere—or come down like a stone?
Clear and dry though the air is, the blue of the skies is pale owing to a light dust haze in the upper atmosphere.