Comet Tempel 1 encounter – tonight
NASA's Stardust-NExT probe is plunging toward Comet Tempel 1 for Valentine's Day encounter designed to reveal how solar heat devours the icy cores of comets. Closest approach happens at 8:37 p.m. PST (11:37 p.m. EST) on Feb. 14th. Stay tuned for fantastic…