What is dark current? Is there evidence of dark current moving in the galaxy?
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http://www.dapla.org/dark_plasma.htm
This dark current is the dark matter movement that is driving the expansion of the universe and pushing galaxies apart.
http://www.scientificamerican.com/article.cfm?id=dark-energy-confirmed
see text
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In terms of photosensors (CCD, maybe CMOS too, etc.), "dark current" is sometimes what engineers call "noise." You can see roughly what this looks like in your camcorder or digital camera if you kick the gain (ISO) all the way up. The warmer the chip, the more noise it has. I think real "dark current" only comes into play when chips are ultra cool, esp. in space astronomy applications.
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