🇬🇧 – 🇮🇹 In 1832 the American Alvan Graham Clark was born, known for having first observed Sirius B while testing a new 18-inch refracting telescope in Cambridgeport, Massachusetts. Sirius B (see photo) is the eighth-magnitude apparent companion to Sirius which was also one of the first observed white dwarfs Nel 1832 nasce l’americano Alvan…