Happy summer solstice! It's the longest day of the year in the Northern Hemisphere, thanks to Earth's axial tilt. Where will you spend all your daylight hours today? 🌍 . . . . Pictured above: #summersolstice at #Stonehenge in 2004, 📷 @gettyimages. #summer #solstice #daytime #longestday #longday #daylight #sun #earth #science #earthscience #seasons #celebrate #celebratesummer #warm #climate #weather #beauty #nature #photography #photo