 An observatory was established on the northern headland for the use of Joseph Lepaute Dagelet whose observations and scientific experiments are among the first European scientific endeavours in Australia.Dagelet undertook calculations on map positions of Botany Bay and carried out astronomical observations which he later shared with Englishman William Dawes.The departure of Phillip and then Laperouse from Botany Bay marked a period of time where, at least on the southern shores of the bay, Aboriginal people did not come into much contact with Europeans.