Jointly organized by the Astronomical Societies of the National University of Singapore (NUS) and Nanyang Technological University (NTU), AstroChallenge is a premier annual competition for Secondary School, Junior College, and Polytechnic students.
The competition aims to deepen astronomical knowledge and ignite a passion for the cosmos while fostering inter-school camaraderie. Participants are tested through a comprehensive syllabus that spans both theoretical concepts and practical observational astronomy.
The 21st Annual Singapore Astronomy Competition took place on June 4th, 6th, and 11th, 2025. The SST Astronomy Club was well-represented by five dedicated teams:
| TEAM | NAMES | Class |
| 1 | CHEOK YING RUI | S2-01 |
| 1 | CHUAH PIN JING | S2-01 |
| 1 | YEO ZHI XIN , PIPER | S2-01 |
| 1 | AURELIUS LI | S2-01 |
| 2 | ZANDER CHOY KIT YU (CAI JIEYU) | S2-08 |
| 2 | TEO YU JIE JORDAN | S2-09 |
| 2 | TOH TECK MING | S2-09 |
| 2 | VEGUS LIM ZEN KNG | S2-09 |
| 3 | LEE XUAN QIANG | S2-03 |
| 3 | YAN MOOK YONG BRIDGET | S2-10 |
| 3 | YE TING ESTHER | S2-10 |
| 3 | CHIEW LEUNG YIN | S2-01 |
| 4 | SANGHAVI AYAN BOBBY | S3-01 |
| 4 | EDRIC KOH YING ZE | S3-06 |
| 5 | JAYDEN JAMES | S3-08 |
| 5 | TOH HONG RUI, TREVOR (ZHUO HONGRUI) | S3-04 |
| 5 | ALLEN JOEL GAN WEI EN | S3-07 |
| 5 | CHONG EU BIN LUCAS | S3-08 |
| 5 | TOH HONG RUI, TREVOR (ZHUO HONGRUI) | S3-04 |
Three of our students—Aurelius Li (S2-01), Chiew Leung Yin (S2-01), and Toh Hong Rui, Trevor (S3-04)—delivered an impressive performance, securing 5th position in the Team Round during the Grand Finals.
