FRIDAY: >> Comets on Fire bring their detailed, funky prog sound to D.C., with openers Benjy Ferree(***) and (The Sounds of) Kaleidoscope at Black Cat. I (heart) music tells us that if you love Deep Purple, you’ll like Comets on Fire. Listen to a few tracks over at Hype Machine to test the waters. $12, 9:30 p.m. >> Looking for a straight-up chance to dance? Venezuela’s Los Amigos Invisibles always deliver, with DJ Afro at…

Heaven is a bleak place for Anselm Kiefer. In one of the largest retrospectives of the revered German artist, featured this summer at the Hirshhorn, Heaven and Earth reevaluates Kiefer’s thirty-year career in terms of the futile struggle to transcend the mundane and reach towards the heavenly. Yet in Kiefer’s imagining, we never quite get there, hovering, instead, in the murky ether of his canvas. Best known for his dark commentary on German culture…