Last night, on June 11, thousands of people crowded into Manhattan’s streets to witness Manhattanhenge—a solar phenomenon in which the setting sun perfectly aligns with the east-west streets of the city's street grid. The event occurs twice a year, for two days, before and after the summer solstice. It was named Manhattanhenge by American astrophysicist Neil deGrasse Tyson in honor of England’s Stonehenge, where the sun rises in alignment with several stones on the summer solstice.

This year, Manhattanhenge fell between May 29-30, and on Monday evening it returned for a second two-day showing. But if you missed last night’s sunset, fear not: we’re being treated to a repeat tonight, around 8:20 p.m, and the weather's supposed to be perfect.

Want to watch Manhattanhenge in all its shining glory? The American Museum of Natural History recommends positioning yourself as far east in Manhattan as possible, preferably on 14th, 23rd, 34th, 42nd, and 57th Streets. To inspire you to bring along your camera, here are a few pictures from last night: