There will be a special screening Friday night of the Sundance award winning documentary "Apollo 11." Followed by an after-hours party on the roof of the Observatory.
Film screening and after party starts at 8 p.m: $50 for Friends of the Observatory members; $75 for non-members.
On Saturday, there will be free daylong program of space themed presentations, activities, and celebrations to honor one of humankind's greatest achievements.