The exhibition “Black Holes: Space Warps & Time Twists,” produced by the Harvard-Smithsonian Center for Astrophysics, will open at the Boston Museum of Science on June 21. The exhibit journeys to the edge of black holes to discover how recent scientific research is challenging notions of space and time, and, in the process, turning science fiction into fact. Discounted museum passes are available through Outings & Innings, 9 Holyoke St., (617) 495-2828.