Iranian students have won the first place in the 17th International Olympiad on Astronomy and Astrophysics (IOAA).

Iran dispatched a five-member team to the event, which was held this year in Vassouras, Rio de Janeiro, Brazil, from August 17 to 27.

More than 250 students from 57 countries contended in the competition.

The delegation compromised Hannaneh Khorramdashti, Mohammad-Mehdi Keshavarzi, Arya Fateh-Kerdari, and Ali Naderi-Lordjan.

The IOAA is an annual international astronomy competition for high school students and was first held in Thailand in 2007.