Gellio Sasceride

Gellio Sasceride (Sasserides) (1562—1612) was a Danish astronomer and doctor. Sasceride worked as an assistant to Tycho Brahe after studying under him. It is believed that the following words were written by Sasceride to Brahe: Quia adhuc aliquid superest spatii, quae sequuntur paucula, sic expetente typographo, subiungi permisi ex literis cuiusdam medicinae Doctoris, Patavii commorantis, ad quendam studiosum Danum.

Sasceride was also friends with Galileo. On December 28 1592, after Galileo had begun his studies, he wrote a letter to Sasceride (at the time no longer Brahe's assistant) with the words Exordium erat splendidum ("[my] debut was excellent"). In 1590, Sasceride had sent to Galileo the only copy of a book until then found in Italy detailing the heliocentric system.

Sasserides crater, on the Moon, is named after him. It lies near Tycho crater, named after Tycho Brahe.