Furthermore, the range of the effect will not extend beyond the upper atmosphere.

They went there, he said, to study the chemistry of the upper atmosphere.

Life on this planet really exists in the upper atmosphere.

Over time, He in the upper atmosphere is lost into space.

He said it did not come close to the earth's surface, but hovered in the upper atmosphere.

"You will need new ones for the upper atmosphere and - let's see, what else?"

"The biggest chunks will hit the upper atmosphere soon, and then it'll happen pretty quickly."

It seemed to be in the upper atmosphere, way above the clouds.

Its a small % - most that get to the upper atmosphere lose energy and are held by earth's gravity.

There was some concern about the effects of flight into the upper atmosphere on living creatures.