Patrick Seitzer, associate research scientist and lecturer in the Department of Astronomy, adjusts the lunar phase mechanism on the Zeiss ZKP 3/B projector in Angell Hall's recently renovated planetarium. The projector can show the night sky as seen from any place on Earth at any time. About 7,000 stars can be projected, as well as the sun, moon and the five brightest planets. The teaching facility is hosting a free program 'Tuesdays at the Planetarium' every week through Feb. 22. Shows run every half hour from 4:30-6 p.m. in Room 3118 of Angell. (Photo by Paul Jaronski, U-M Photo Services)