A method for improving Milky Way exposures in light pollution
While idly thinking about light pollution a while ago, I thought of a ridiculously impractical solution:Mandate the replacement of all outdoor night-time illumination with LEDs that are pulse-width modulated at a low duty cycle. Synchronize them all to an accurate global clock (e.g. from a GPS receiver), so that for instance, all of the lights are simultaneously turned on for the first tenth of each UTC millisecond. Then an image sensor with a sufficiently fast global shutter could disable itself during every brief pulse of light, so that it picks up 90% of the incoming starlight, but almost none of the light pollution.