The harvest moon rises in the skies over Olympia, Washington; Whitby in England and Hanoi, Vietnam. Did you see this late-summer spectacle? 🌕 The harvest moon is the full moon closest to the autumnal equinox, which this year will be Sept. 22. But why the nickname? "In the days before tractors with headlights, having moonlight to work by was crucial to getting the harvest in quickly before rain caused it to rot," according to Alan MacRobert, an editor at Sky & Telescope magazine. 📸@apnews, @afpphoto via @gettyimages #fullmoon #harvestmoon