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…the flash of light was caused by the firing of a small reaction control system (RCS) thruster on the space shuttle. Oberg has asserted that:
The RCS jets usually fire in 80-millisecond pulses to keep the shuttle pointed in a desired direction, under autopilot control (usually once every few minutes). These jets may flash when they ignite if the mixture ratio is not quite right. Propellant also tends to seep out the feed lines into the nozzle, where it accumulates, freezes through evaporative cooling, and flakes off during the next firing. The ejected burn byproducts travel at about 1000 ft/sec. One pulse usually emits about a quarter pound of propellant in a fan-shaped plume.
When the thruster starts firing, the propellants are briefly exposed to the vacuum of space after flowing out of the opened valves until they reach the combustion chamber and ignite. While exposed to vacuum, some of the liquid propellants boils off into space and then immediately freezes into "microscopic snow. In the case of the small thrusters, this happens so quickly over the short distance from the valve to the combustion chamber (about 2 inches) that the amount of “snow" generated is too small to be seen.
But the dribble volume is large enough that the snow generated can be seen as a white plume in reflected sunlight. It is totally invisible without some external source of illumination.
Originally posted by Balez
I do believe that the RCS was fired, but i dont think it is consistent with how the objects move.
Originally posted by KSCVeteran
Those advanced technology "objects" were there and were attacked by a weapon we called "Brilliant Peebles" at that time in our US Space Program History.
Originally posted by mikesingh
Originally posted by Balez
I do believe that the RCS was fired, but i dont think it is consistent with how the objects move.
Hi Balez! You hit the nail on the head! Need I say more?
Cheers!