RT @Astroguyz: #OnThisDay 1612: Galileo observes (& sketches!) Neptune near Jupiter 234 years prior to discovery: http://t.co/ZKRzVPkNUb
RT @Astroguyz: #OnThisDay 1612: Galileo observes (& sketches!) Neptune near Jupiter 234 years prior to discovery: http://t.co/ZKRzVPkNUb