| Antonio Abetti | |
| Birth Date: | 19 June 1846 |
| Birth Place: | San Pietro di Gorizia, Austrian Empire |
| Death Place: | Arcetri, Kingdom of Italy |
| Nationality: | Italian |
| Field: | Astronomy |
| Work Institutions: | Osservatorio Astrofisico di Arcetri |
| Alma Mater: | University of Padua |
Antonio Abetti (19 June 1846 – 20 February 1928) was an Italian astronomer.
Born in San Pietro di Gorizia (Šempeter-Vrtojba), he earned a degree in mathematics and engineering at the University of Padua. He was married to Giovanna Colbachini in 1879 and they had two sons.[1] He died in Arcetri.
Abetti mainly worked in positional astronomy and made many observations of minor planets, comets, and star occultations. In 1874 he was part of an expedition led by Pietro Tacchini to observe a transit of Venus with a spectroscope. Later he became director of the Osservatorio Astrofisico di Arcetri and a professor at the University of Florence. He refurbished the observatory at Arcetri by installing a new telescope.