▁to ▁D end ro chron ology . ▁|| ▁ ▁| - id = 8 4 6 ▁| ▁ 7 5 8 4 6 ▁J and orf ▁|| ▁ ▁|| ▁Harold ▁" H al " ▁J and orf ▁( born ▁ 1 9 4 8 ) ▁is ▁a ▁well - lik ed ▁professor ▁of ▁astronom y ▁at ▁Los ▁Angeles ▁Valley ▁College ▁in ▁Valley ▁Glen , ▁California . ▁He ▁is ▁also ▁adj unct ▁fac ulty ▁at ▁Mo or park ▁College ▁in ▁California , ▁has ▁author ed ▁several ▁ed itions ▁of ▁Exper ien ces ▁in ▁Astronom y ▁and ▁is ▁a ▁popular ▁out re ach ▁speaker ▁with ▁the ▁Vent ura ▁County ▁Astronom ical ▁Society . ▁|| ▁ ▁| - id = 8 5 2 ▁| ▁ 7 5 8 5 2 ▁El gie ▁|| ▁ 2 0 0 0 ▁C Y ▁|| ▁Joseph ▁Henry ▁El gie ▁( 1 8 6 4 – 1 9 3 7 ) ▁was ▁an ▁astronom y ▁popular izer , ▁who ▁was ▁elected ▁a ▁Fellow ▁of ▁the ▁Royal ▁Astronom ical ▁Society ▁in ▁ 1 9 0 5 ▁and ▁member ▁of ▁the ▁British ▁Astronom ical ▁Association ▁in ▁ 1 9 1 0 . ▁He ▁wrote ▁seven ▁books ▁on ▁astronom y ▁and ▁the ▁weather , ▁and ▁made ▁radio ▁broadcast s ▁on ▁the ▁BBC ▁in ▁the ▁ 1 9 2 0 s . ▁|| ▁ ▁| } ▁▁ 7 5 9 0 1 – 7 6 0 0 0 ▁▁ ▁| - bg color = # f 2 f 2 f 2 ▁| ▁col span =