I know. IT’S FUCKIN’ HOT. But if you are like me and think that it’s not that bad, then you need to come out this afternoon to a free performance by the Philly intergalactic orchestra Sun Ra Arkestra (behind the Walnut St. Free Library in University City). Currently led by Maestro Marshall Allen, this band of space age misfits have been invading audiences’ minds since 1968 when Le Sony’r Ra assembled his army of musical shape-shifters. Just make sure to bring plenty of water. The Walnut St. Free Library on 40th St. (outside directly behind the building), 6pm, FREE, All Ages – H.M. Kauffman