SFist Tonight

Tonight, grab a 7:30 p.m. low cost ($4) lecture on planets, stars and brown dwarfs with Dr. Ray Jayawardhana at the JCC. We love the JCC space, because it's organized, clean, and spacious. There's a friendly vibe, too, but be prepared to pop your trunk for a bomb search if you park in the JCC lot. Origins of Planets and Brown Dwarfs at the Jewish Community Center of San Francisco, 3200 California Street. Phone: 415-292-1233.

Or, ponder a world free of nukes with Former U.S. Secretary of State George P. Schultz, former U.S. Secretary of Defense William J. Perry & others. Skidaddle over to the Fairmont Hotel at 950 Mason Street. Event is $10-$20, and starts at 6 p.m. Phone: 415-772-5000.