I just got back from the windy city. We spent four nights seeing the shows (comedy), and five days seeing the sights, one of which is the Adler Planetarium (left). We went to the planetarium to be inside on an overcast day, and to sit and rest our weary tourist feet. There are exhibits to walk through, but there are theaters, too, where you can sit down, lean back in the dark, and tour the stars.
Planetaria have changed since James Dean ached to run with the in crowd at Griffith Observatory. There’s no longer a big bronze ball in the center of the room projecting light through the “stars” drilled in it. Everything is digital, and the planets and the galaxies and the constellations—now photographed in stunning detail courtesy NASA and Hubble—swoop into view and out again.
Hubble photos are one of the great things our tax dollars have paid for, and here are a lot of them:

I know I’ve told you all about this 
