Observer Editor, Free
Angell Hall Observatory Open House: U-M Student Astronomical Society.
All invited to peer through the observatory and rooftop telescopes and to view planetarium shows. Also, short astronomy presentations by club members. 9–11 p.m., 5th floor rooftop observatory, Angell Hall (enter through Haven Hall on the Diag side of the building). Mask required. Free. 764–3440.