Museum Celebrates Transits / APS Museum / Independence Hall tower / American Philosophical Society Museum / Lick Observatory / University of Pennsylvania / Independence Hall / The Franklin Institute / Philosophical Hall / /
NaturalFeature
Cape Henlopen / /
Organization
Royal Society in London / Franklin Institute / the University of Pennsylvania / American Philosophical Society / State House / /
Person
Jeremiah Horrocks / Franklin / William Smith / Derrick Pitts / Nevil Maskelyn / David Rittenhouse / John Dovaston / Venus Past / Andrea Wulf / John Lukens / Michael Doveton / Cook / Jean Baptiste Le Roy / John Ewing / Johannes Kepler / Elaine Wilner / / /