Quote:
Originally Posted by Enoch Root
And if the lights are a propulsion system, why do they disappear? If aliens are driving around, and their ships are visible, we should be seeing them all over the place, and be able to track them.
Is it invisible, or visible?
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I'm not suggesting the lights are a propulsion system, but a product of the propulsion system under certain conditions. Again, just like carbon monoxide is a colorless exhaust gas that is generated through internal combustion, and its pretty hard to detect without technology except under conditions of extreme cold, light may be an artifact of the propulsion system in use. Using the CO example, you don't always see it, even when it is cold. The exhaust may be pointed in a different direction. The atmospheric conditions may be such that you don't see the vapor or the vapor dissipates. Lots of reasons for not being able to see the byproduct from something that is happening around us.
If the propulsion system is driven through either a electromagnetic or plasma field, it is likely going to have some form of radiation as its by product or what it leaves as its signature. Radiation is likely that byproduct and most likely to manifest in the form of heat or light. Under the right conditions, the heat may be visible, but under others it disappears. The byproduct may still be there, but we can no longer see it as it is not evident in the visible spectrum. It's why some of these craft are tracked through infrared and not the visible spectrum camera. That would also explain their ability to disappear. Especially if they do rely on warping space to propel the craft.