« on: 26/04/2011 14:25:11 »
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For a while, the engine will actually fall at a contant velocity. The incoming air still gets compressed. But,there's no source of heat so the engine makes negative net thrust (or drag). The acceleration due to gravity can match the deceleration due to aerodynamic drag.
It depends where you set the bar. If there were such things as UFO's,
the technology and knowledge they use would be so advanced (faster than light travel and all) that they would probably consider there was no life on this planet. From our perspective, atoms join in crystals and molecules which undergo processes and form patterns and, Bob's your uncle, we have life.
I know 
I wasn't, until I became aware of all the political/administrative problems in the management of dangerous/toxic plants and wastes.
I'd hazard a guess of only seconds unless we had a source of heat. Everything would simply freeze solid.