David Meinzer, left, and Cody Lavery work on a new interactive exhibit called the "Gravity Floor" at the Clark Planetarium in Salt Lake City on Thursday. After a brief two-week closure for major interior construction, the planetarium's theaters are now open, though the exhibit galleries remain closed while additional construction continues. As a thank you to visitors, the planetarium is offering $4 tickets in both the Orbital ATK IMAX Theatre and the Hansen Dome Theatre through Oct. 21. The two-week closure commenced the home stretch of the facility's yearlong renovation project, which will be unveiled to the public during the "Ready Set Re-Launch" party at 10:30 a.m. Saturday, Oct. 22.