From Adler Planetarium: WHAT IS ADLER AFTER DARK? Exclusively for adults 21+, this evening offers you open access, unlimited shows, and unique entertainment every third Thursday of the month from 6:00–10:00 pm (Summer hours, May-August: 6:30–10:30 pm.)  With themes that change every month, Adler After Dark is never the same event twice. Reinvent your Adler experience every month with friends,…