Giuseppe Piazzi (July 7 1746 - July 22 1826) was an Italian Theatine monk, mathematician, and astronomer. He was born in Ponte in Valtellina, and died in Naples. He established an observatory at Palermo, now the Osservatorio Astronomico di Palermo "Giuseppe S. Vaiana". On January 1, 1801, Piazzi discovered a stellar object that moved against the background of stars. At first he thought it was a fixed star, but once he noticed that it moved, … Wikipedia
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