Giuseppe Piazzi
![[[Costanzo Angelini]], ''Portrait of Giuseppe Piazzi'', {{circa|1825}}](https://upload.wikimedia.org/wikipedia/commons/e/e9/Costanzo_Angelini%2C_L%27astronomo_Piazzi_1825_ca.jpg)
Giuseppe Piazzi ( , ; 16 July 1746 – 22 July 1826) was an Italian Catholic priest of the Theatine order, mathematician, and astronomer. He established an observatory at Palermo, now the ''Osservatorio Astronomico di Palermo – Giuseppe S. Vaiana''. He is perhaps most famous for his discovery of the first dwarf planet, Ceres.
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