RT @AstroKatie: Live G+ coverage of Comet #SidingSpring approaching #Mars: plus.google.com/u/0/events/c37… — two days from now! http://t.co/ptDqkh67aT
RT @AstroKatie: Live G+ coverage of Comet #SidingSpring approaching #Mars: plus.google.com/u/0/events/c37… — two days from now! http://t.co/ptDqkh67aT