The IOAA (International Olympiad on Astronomy and Astrophysics) and IESO (International Earth Science Olympiad) are premier global science competitions for high school students. They aim to ignite interest in astronomy and earth sciences through challenging problems. These contests not only enhance students' knowledge and skills in these fields but also provide an international platform to showcase their talents.

IOAA（国际奥林匹克天文学与天体物理学竞赛）和IESO（国际地球科学奥林匹克竞赛）是全球顶级的中学生科学竞赛，旨在通过挑战性的试题激发学生对天文学和地球科学的兴趣。这些竞赛不仅促进学生在科学领域的知识和技能提升，还为他们提供了展示才华的国际平台。