RT @AstronomyNow: Watch a replay of NASA’s news conference about Dawn’s arrival at dwarf planet Ceres: astronomynow.com/2015/03/03/daw… http://t.co/6pQuqlIGVj
RT @AstronomyNow: Watch a replay of NASA’s news conference about Dawn’s arrival at dwarf planet Ceres: astronomynow.com/2015/03/03/daw… http://t.co/6pQuqlIGVj