In Juun 1846, ka dib markii uu arkay Le Verrier ee ugu horeysay ee lagu daabacay qiyaasta dhererka meeraha ee meeraha iyo sida ay u la mid tahay qiyaasta Adams ee, Airy dhaadhiciyay Challis si ay u raadiyaan meeraha. Challis si aan macquul aheyn ku scurried samada oo dhan August iyo September. Dhanka kale, Le Verrier by warqad ku boorriyay Berlin Observatory astronomer Johann Gottfried Galle si ay u raadiyaan la refractor ee Observatory ee. Heinrich d'Arrest Adams, arday ka tirsan Observatory, soo jeediyay Galle in ay isbar dhigaan kartaa khariidadda dhawaan barbaro ee gobolka of Le Verrier ee saadaaliyay Adams la goobta hadda si ay u raadiyaan meeraha ee xiddigaha si ay u raadiyaan beddelidda xiddigaha, sida saadaaliyay in xiddigaha ku sugan cirka, sida saxda ah si loo ogaado sida ay u dhacday in la ogaado Neptune, laakiin waxa uu ku guuldareystay in ay dib-u-heshigaan labada taariikhiyey
Warqadaha Neptune