INAO (Indian National Astronomy Olympiad)

Students who qualify for the National Standard Examination of Astronomy (NSEA) will be eligible to compete in the HBCSE’s (Homi Bhabha Center For Science Education) Indian National Astronomy Olympiad (INAO) 2021-22.  In most cases, this exam is held around the end of November. It is the second step, and only those applicants who have passed the first stage, the NSEA, are eligible to take the test.

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Olympiad is a worldwide competition based mostly on school curricula. These tests encourage students to begin preparing for national-level exams that they may take in the future. Candidates should be familiar with the pattern and the number of phases they might go through before attending the INAO 2021-2022. Let’s have a look at some of the stages that will be mentioned further down.

Exam Pattern for INAO 2021-2022

INAO Exam pattern details are given below

Conducting Body Homi Bhabha Center For Scientific Education (HBCSE)
Time Allotted 3 hours
Type of Question Part- 1 (NSEA) will be objective and Part 2- (INAO) will be subjective
Medium of Examination English and Hindi
Maximum Marks 100
Total No. of Questions 7 questions

The Astronomy Olympiad Program is divided into five parts.

Stage 1: National Standard Examination in Astronomy (NSEA).

Stage 2: Indian National Astronomy Olympiad (INAO).

Stage 3: Orientation cum Selection Camp in Astronomy (OCSC).

Stage 4: Pre-departure Training Camp (PDT) for IOAA.

Stage 5: International Olympiad in Astronomy and Astrophysics (IOAA).

The candidates are eligible for INO‘s Astronomy Examination (INAO) after qualifying for the National Standard Examination in Astronomy (NSEA).

INAO Eligibility Criteria

The following are the INAO eligibility requirements

  • All Indian students in Class XII or below who were born between July 1, 2002, and June 30, 2007, inclusive, are eligible to take the INAO 2021–2022 test. Students who have completed Class XII are not eligible to participate in INAO.
  • Candidates must have lived in India and attended Indian schools since November 2019 or before.
  • By June 1, 2021, candidates must not have intended to begin studies at universities or comparable institutes.
  • Before November 30, 2020, you must have passed the class XII board examination or its equivalent.
  • It is not permitted to appear in NSEJS 2021.

INAO Syllabus

Given Below are the Important Topics Included under Each Subject for INAO

Although the conducting authority has not released a full syllabus for INAO, the topics mostly encompass Physics, Mathematics, and Elementary Astronomy up to CBSE Class 12 level.

INAO Subject-Wise Topics
Physics Mathematics Elementary Astronomy
Capacitance, energy stored in a capacitor, parallel plate capacitors Number Theory and Complex Numbers Astronomy
Circular motion and kinematics of circular motion Lines, Triangles, Solid shapes and Conic Sections Gravitation
Current electricity and its temperature dependence Circles, Ellipse, Parabola and Hyperbola Escape Velocity
Kirchoff’s current law and voltage law Orthogonality,Parametric equations, Quadratic Equations Kepler’s Law
Electromagnetic waves, electrostatic field, electric field and electric potential Integration and Differentiation Miscellaneous
Measurement errors and maximum permissible error Permutations and Combinations
Geometrical optics, Plane and Spherical Mirrors, Optical Instruments and Eye defects Straight Lines, Equation of Lines, Trigonometric Identities, Sine and Cosine Values
Kinematics, Thermodynamics and Kinetic Theory of Gasses Nature of Roots, Sequences and Series
Fluid Mechanics and Archimedes Principle Statistics and Probability
Heat Transfer, Steffen’s and Wien’s Law
Force and Newton’s Laws of Motion
Heating, Magnetic and Chemical effects of electric current
Projectile Motion, Relative Motion in one and two dimension
Surface Energy and Surface Tension
Units and Dimensions of Physical Quantities

Books Recommended for INAO

Book Name Author Name
Collection of Experimental Problems in Physics Rajesh B. Khaparde, H. C. Pradhan
Experimental Problems in Chemistry Savita Ladage, Swapna Narvekar and Indrani Sen
Indian National Physics Olympiad – Theory Problems (1998 – 2005), Vijay A. Singh and Shirish R. Pathare
Indian National Physics Olympiad – Theory Problems and Solutions (2006 – 2009) Vijay A. Singh and Praveen Pathak
Problems and Solutions of International Olympiad on Astronomy and Astrophysics (2007 -2014), Dr Aniket Sule
Training in Experimental Physics Through Demonstrations and Problems Rajesh B. Khaparde, H. C. Pradhan

INAO Result

The result day must be the most expected day for students taking INAO 2021- 2022 after the test. 250 students will be chosen for INAO stage II from all categories. As a result, 500 students will be selected. Only 35 people are chosen from the 500 applicants to attend the Orientation and Selection Camp. After the exam, you may check the INAO results on HBCSE’s official website.

Frequently Asked Questions on INAO Exam: Indian National Astronomy Olympiad (INAO)


What is the procedure for taking the International Olympiad Exam?

The students’ batch will be divided into two groups, Group A and Group B.
From November 30, 2020, pupils in Group A will be in Class XII.
As of November 30, Group B consists of pupils in Class XI or lower.
Both groups will have the identical question paper for NSEA 2020 and INAO 2021.
A total of 250 students will be chosen from each group for stage II of INAO, bringing the total number of students to 500.
For each category, the Merit Index (MI) and Minimum Admissible Score (MAS) are determined separately.

What is the Screening Procedure for the Astronomy Olympiad?

In the batch/pool, the students are divided into two classes, A and B. As of November 2020, students in Group A must be in Class XII, while students in Group B must be in Class XI or lower.
For INAO stage II, a total of 250 students will be picked from each category. 500 students will be picked as a consequence.

What subjects are covered in the INAO Syllabus?

The INAO test follows the same course as the National Standard Examination In Astronomy (NSEA), however the questions are significantly more difficult. It includes themes from the CBSE textbooks in the fields of Physics, Mathematics, and Astronomy. INAO questions are graded on a scale of 10+2 and are designed to assess the candidate’s higher-order thinking abilities.

What are the five stages of INAO?

Stage 1: NSEA (National Standard Examination in Astronomy).
Stage 2: INAO (Indian National Astronomy Olympiad).
Stage 3: OCSC (Orientation cum Selection Camp in astronomy).
Stage 4: Pre-departure Training Camp (PDT) for IOAA.
Stage 5: IOAA (International Olympiad in Astronomy and Astrophysics).

How can I look for INAO results online?

Candidates may view their INAO test results by going to the HBCSE’s official website. The steps to verify INAO Results online are as follows:
HBCSE’s official webpage may be found here.
Choose ‘Indian National Olympiad’ from the drop-down menu.
Select ‘INAO 2021’ from the drop-down menu.
Enter your registered email address and password to log in.
Select ‘Check INAO Result 2021’ from the drop-down menu.
Enter your NSE Roll Number as well as your date of birth.
For future reference, check out and download the INBO Performance Card.