Zodiacal light is now thought to be caused by dust particles scattering sunlight in the orbits of comets. In both hemispheres it’s best observed in late winter/early spring after sunset and late summer/early fall before sunrise. However, it can be detected before astronomical twilight (morning) or after astronomical twilight (evening) at other times of the year as well, providing that the sky is quite dark.
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The photo above is from Shawn’s recent journey to Isle Royale. Follow her at Lake Superior Photo on Facebook and view and purchase many more photos – including a gallery of Isle Royale pictures – on her website.