Look low in the western sky after sunset over the next few days and you may catch a glimpse of mesmerizing Earthshine lighting up the young moon.
The phenomenon occurs when sunlight is reflected off Earth and back toward the moon according to geophysicist Chris Vaughan, an amateur astronomer with SkySafari Software who oversees Space.com's Night Sky calendar. The reflected light slightly brightens the dark portion of the moon's Earth-facing hemisphere.
The enchanting sight is also known as the Ashen Glow and "the old moon in the new moon's arms," according to Vaughan.
If you're looking for a telescope or binoculars to observe Earthshine, our guides for the best binoculars deals and the best telescope deals now can help. Our best cameras for astrophotography and best lenses for astrophotography can also help you prepare to capture the next skywatching sight on your own.
Editor's Note: If you snap a photo of Earthshine and would like to share it with Space.com's readers, send your photo(s), comments, and your name and location to email@example.com.