IOAA
Here you find the problems and solutions of the International Olympiad on Astronomy and Astrophysics.
Useful resource: Compilation of IOAA problems 2007-2012
2019 - Hungary
13th IOAA:
2018 - China
12th IOAA:
2017 - Thailand
11th IOAA:
2016 - India
10th IOAA:
2015 - Indonesia
9th IOAA:
2014 - Romania
8th IOAA:
2013 - Greece
7th IOAA:
2012 - Brazil
6th IOAA:
2011 - Poland
5th IOAA:
2010 - China
4th IOAA:
2009 - Iran
3rd IOAA:
2008 - Indonesia
2nd IOAA:
2007 - Thailand
1st IOAA: