September 4, 2021
Those traveling to dark locations can be on the lookout for Zodiacal Light. As we approach the Autumnal Equinox, about one hour before sunrise you may find a bright wedge of light appearing along the zodiac constellations in the east. This phenomenon is caused by sunlight reflecting off dust in our solar system.
Zodiacal light seen behind the Submillimeter Array from the summit of Mauna Kea. Image credit: Steven Keys