"The zodiacal light – or false dusk – is an eerie light extending up from the horizon. You’re most likely to see it about an hour after sunset in the spring, or an hour before dawn in the autumn.
Maybe you’ve seen the zodiacal light in the sky and not realized it! Maybe while driving on a highway or country road – somewhere in the southern U.S. or similar latitudes – at this time of year. Suppose you’re driving west in the hour after dusk. You catch sight of what you think is the lingering evening twilight, or the light of a nearby town, just over the horizon. Instead, what you’re seeing is the zodiacal light.
This strange light is a seasonal phenomenon. You’re most likely to see it in the west after sunset in the late winter and early spring. In late summer and early autumn, you see it most often in the east before dawn. It looks like a hazy pyramid of light extending up from the western horizon, after evening twilight ends."