| Category | Details |
|---|---|
| Event | 18th International Olympiad on Astronomy and Astrophysics (IOAA) |
| Dates | 11th-21st August 2025 |
| Location | Mumbai, India |
| Hosting History | Second time India is hosting (first was 2016 in Bhubaneswar). |
| Organizer | Homi Bhabha Centre for Science Education (HBCSE) (under DAE, Govt. of India). |
| Supported by | Vigyan Pratibha Project of HBCSE. |
| Theme | 'Vasudaiva Kutumbakam' (World as one family under one sky). |
| Logo Features | Gateway of India, GSLV rocket, spider symbolizing telescopes, Milky Way-inspired colors. |
| Participants | 300+ students from 64 countries. |
| Competition Format | Theoretical, observational, and data analysis exams in astronomy. |
| About IOAA | Annual competition for secondary school students (Classes 10-12); first held in 2007 (Thailand). |
| HBCSE Role | Nodal centre for Olympiads (maths, physics, astronomy, chemistry, biology). |
| Key HBCSE Program | National Initiative on Undergraduate Science (NIUS). |
| Astronomy Definition | Study of celestial objects (stars, planets, galaxies, universe). |
| Astrophysics Definition | Branch using physics principles to explain celestial objects' behavior. |
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