Neptune identified as planet 170 years ago this hour #OnThisDay #OTD (Sep 23 1846)


Video: 'Top 10 AMAZING Facts About Neptune'

(Thursday, September 24, 1846, just after midnight local time)Neptune, the eighth and farthest known planet from the Sun in the Solar System, was identified as a planet early this morning at the Berlin Observatory by German astronomer Johann Gottfried Galle.