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.

Abetti mainly worked in positional astronomy and made many observations of minor planets, comets, and star occultations.

In 1874 he was part of an Italian expedition to Muddapur, in India, led by Pietro Tacchini to observe a transit of Venus with a spectroscope.

[2] Later he became director of the Osservatorio Astrofisico di Arcetri and a professor at the University of Florence.