Overview
The National Standard Examination in Astronomy (NSEA) is the first stage of India's astronomy olympiad pathway, conducted by the Indian Association of Physics Teachers (IAPT). Clearing NSEA leads to the Indian National Astronomy Olympiad (INAO), run by the Homi Bhabha Centre for Science Education (HBCSE), which selects India's team for the International Olympiad on Astronomy and Astrophysics (IOAA).
Who can take part
For the 2025-26 cycle, NSEA was open to students who were in Class 10, 11 or 12 and would not complete Class 12 before November 30, 2025, born between July 1, 2006 and June 30, 2011 (both dates inclusive). Students must be eligible to hold an Indian passport, must have been studying in India (or in an Indian school system) since November 30, 2023 or earlier, and must not have started university by June 1, 2026. A student cannot appear for both NSEA and NSEJS (the junior-level exam) in the same year.
Stages and pathway
| Stage | Round | Conducted by |
|---|---|---|
| 1 | NSEA | IAPT |
| 2 | Indian National Astronomy Olympiad (INAO) | HBCSE |
| 3 | Orientation-cum-Selection Camp (OCSC) | HBCSE |
| 4 | International Olympiad on Astronomy and Astrophysics (IOAA) | International |
Exam pattern
| Detail | NSEA 2025-26 |
|---|---|
| Level | Senior secondary (up to Class 12 CBSE), with greater emphasis on Physics, Mathematics and elementary Astronomy |
| Question type | Part A-1: 48 single-correct MCQs; Part A-2: 12 multiple-correct MCQs |
| Marking | Part A-1: +3 for a correct answer, −1 for a wrong one; Part A-2: +6 if all correct options are marked and none wrong, no negative marking |
| Total marks | 216 |
| Duration | 2 hours |
| Mode | Offline, OMR-based |
| Language | English only |
Syllabus
NSEA draws mainly on Physics and Mathematics up to Class 12 CBSE level, with elementary astronomy concepts layered on top. The detailed syllabus is published by IAPT alongside the student brochure each cycle.
Results and awards
Selection to the Indian National Astronomy Olympiad (INAO) uses a Minimum Standard Score and Merit Index combined with a state-wise proportional representation rule, so that students from across India are represented rather than only the highest-scoring states. Shortlisted students are announced on the IAPT and HBCSE olympiad websites. Certificates are issued for all candidates, and merit certificates go to the top 10% at each centre; students attending the Orientation-cum-Selection Camp (OCSC) go on to be considered for India's IOAA team.
Important dates
For the 2025-26 cycle, NSEA 2025 was held on Saturday, November 22, 2025, 2:30–4:30 pm. Online centre registration opened August 1, 2025, with enrolment closing September 21, 2025.
Fees
For the 2025-26 cycle, the fee was Rs. 300 per student for the exam, payable in cash to the centre in charge, or by bank transfer for students who self-enrol online.
How to register
Registration is normally through a school's registered NSE centre — the school's Principal or a Physics teacher enrols students. If a school cannot register a student, IAPT allows direct enrolment online through its own portal.
Preparation tips
Because Part A-1 penalises wrong answers (−1 mark) while Part A-2 does not, it is worth attempting every Part A-2 question but being selective in Part A-1. Since NSEA leans heavily on Physics and Maths, building strong fundamentals in Class 11–12 CBSE Physics and Maths before layering on astronomy-specific concepts, then working through past NSEA and INAO question papers published by IAPT and HBCSE, follows the level the exam is pitched at.
Is NSEA the same as INAO?
No. NSEA is the first-stage screening exam run by IAPT. Only NSEA qualifiers move on to the Indian National Astronomy Olympiad (INAO), run separately by HBCSE.
Is there negative marking in NSEA?
Yes, in Part A-1 (single-correct MCQs): +3 for a correct answer and −1 for a wrong one. Part A-2 (multiple-correct MCQs) has no negative marking.
Does NSEA need a separate astronomy background?
It builds mainly on Class 11–12 Physics and Mathematics, with elementary astronomy layered on top, so a strong physics/maths base matters as much as astronomy-specific reading.
How do I register for NSEA if my school doesn't offer it?
IAPT allows students to enrol directly online through its own portal if enrolling through a school is not possible.