ed ▁on ▁ 2 9 ▁February ▁ 2 0 1 2 , ▁is ▁scheduled ▁to ▁be ▁complete ▁no ▁earlier ▁than ▁ 2 0 9 2 ▁( and ▁possibly ▁as ▁late ▁as ▁ 2 1 0 1 ). ▁▁ 2 0 9 4 ▁▁ ▁March ▁ 1 9 ▁– ▁A ▁time ▁caps ule ▁se aled ▁exactly ▁sevent y - five ▁years ▁before , ▁is ▁scheduled ▁to ▁be ▁opened ▁at ▁Den ver ▁International ▁Airport . ▁ ▁April ▁ 7 ▁– ▁Mercur y ▁occ ult s ▁Jup iter ; ▁it ▁will ▁be ▁very ▁close ▁to ▁the ▁Sun ▁and ▁impossible ▁to ▁view ▁with ▁n aked ▁eye . ▁▁ 2 0 9 6 ▁▁ ▁February ▁ 2 9 ▁– ▁First ▁time ▁since ▁the ▁introduction ▁of ▁the ▁Greg or ian ▁calendar ▁that ▁Ash ▁Wed nes day ▁falls ▁on ▁February ▁ 2 9 . ▁▁ 2 0 9 6 ▁will ▁be ▁the ▁last ▁le ap ▁year ▁in ▁the ▁ 2 1 st ▁century , ▁as ▁ 2 1 0 0 ▁will ▁not ▁be ▁a ▁le ap ▁year ▁because ▁it ▁is ▁divis ible ▁by ▁ 1 0 0 ▁but ▁not ▁by ▁ 4 0 0 , ▁and ▁it ▁is ▁the ▁first ▁such ▁year ▁since ▁ 1 9 0 0 . ▁ ▁The ▁d war f ▁planet ▁ 2 0 1 5 ▁R R 2 4 5 ▁is ▁expected ▁to ▁make ▁its ▁closest ▁approach ▁to ▁the ▁Sun . ▁▁ 2 0 9 9 ▁▁ ▁The ▁ 1 0 0 - year ▁le ase ▁on ▁to ll ▁Highway ▁ 4 0 7 ▁in