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1st Ec 1st Sh 1st Tr appears Astronomical atmosphere attention bands bright British Association centre colour communicated Conjunction Conjunction of Moon corona dark Decl determined diameter Dione direction disc distance Dunkin earth east eclipse Editor Encel fact give given Greenwich important interest interval Jupiter letter light limb longitude magnitude Mars Mean measures meeting Meridian method minutes month moon moon's motion noticed object observations Observatory obtained Occultation Passage passing photographs physical planet portion position present probably Professor received reference Register remarkable Rhea ring Royal Satellites Saturn seen Society solar spectrum stars station sun's surface taken telescope Tethys tion transit transit of Venus Venus visible