A lokuta biyu, Galileo alama sun kuskure Neptune ga wani gyarawa star a lokacin da ya bayyana kusa-in conjunction-to Jupiter a cikin dare sama; Saboda haka, ya ba da aka yaba da Neptune ta samu. A farko kallo a watan Disamba 1612, Neptune ya kusan stationary a sama domin shi kawai ya juya retrograde cewa rana. Wannan bayyane baya motsi aka halitta a lokacin da Duniya ta kewaye shi ta wuce wani waje duniya. Saboda Galileo ya kawai fara da shekara retrograde sake zagayowar, da motsi na duniya da aka gano ma nisa da za a iya gano tare da abin da yanzu aka sani ya zama matsayi na Neptune ta kananan telescope. A watan Yuli 2009, masanin ilmin taurari Jami'ar Cambridge Sir James Chardon Bouchard ya sanar da cewa Galileo ya ci gaba da samar da karin shaida na m hulda da taurari ta amfani da wani abu da ba a sani ba. A watan Fabrairun 1843, ya yi amfani da wani sabon bincike na tauraron tauraron tauraron tauraron tauraron tauraron tauraron tauraron tauraron tauraron tauraron tauraron tauraron tauraron tauraron tauraron tauraron tauraron tauraron taur
Fabrairu na shekara ta 1844