Bay seniors interested in taking advantage of their insomnia might want to head to the Oakland hills before dawn this Friday to watch (weather permitting) a total lunar eclipse. Witness the moon pass through earth’s shadow on the Observation Deck of the Chabot Observatory from 2am to 5:30am. Astronomical experts will be on hand to answer your questions. $12 for non-members. You’re advised to arrive with your own binoculars, blankets and warm clothes.