National Astronomy Challenge (NAC)
National Recognition & ISRO Visit
30,000 participants
The National Astronomy Challenge (NAC) is a leading online competition for Indian students in Grades 4-9, designed to test and enhance their knowledge in astronomy and space sciences through engaging multiple-choice questions.
Mode
Online
Fee
₹250
Participation format
Individual
Duration
60 minutes
Eligibility
This competition is open to students in Grades 4-9 (ages 9-15) across India and overseas. Participants should have a strong interest in astronomy and space sciences. Registration can be done through schools or directly by parents.
- Grade level
- Grade 4 to 9
- Age range
- 9 to 15 years
- Eligibility region
- Available nationwide across India
- Academic requirement
- Students must have a keen interest in astronomy and space sciences.
- Prerequisites
- Basic understanding of science concepts relevant to their grade level
See if your child qualifies.
Rewards and recognition
Prizes
Awards, Medals & ISRO Visit
Top performers receive national awards, medals, and unique opportunities including visits to ISRO facilities and leading space start-ups, fostering real-world exposure to space science.
Certificate
Certificates of Participation/Merit
All participants receive Certificates of Participation. High scorers receive Merit Certificates. School Champions receive Excellence Certificates, all recognized by Stem and Space.
Opens doors to
Provides a strong foundation and competitive edge for admissions to higher education programs in STEM, particularly astronomy and physics, laying groundwork for future academic pursuits.
Career pathways
Inspires and prepares students for future careers in space exploration, scientific research, and technology development, offering exposure to leading organizations like ISRO and space start-ups.
Recognition
National Recognition
Skills your child builds
Key dates
Last edition
- Registration opened
- 25 Aug 2025
- Registration closed
- 31 Dec 2025
- Competition
- 24 Jan 2026 to 31 Jan 2026
- Results
- 31 Mar 2026
How to apply
- 1Students can register through their schools via a custom registration link provided by NAC.
- 2Parents can register their child directly on the NAC website if their school is not participating.
- 3All registration information must be filled accurately.
- 4Documents such as school ID or Aadhar card may be required for verification purposes.
Rules and guidelines
- Participants must be students in Grades 4 to 9.
- The exam will be conducted online and will be AI-proctored.
- Use of mobile phones and tablets is strictly prohibited during the exam; only desktops or laptops with an inbuilt camera and stable internet connection are allowed.
- A negative marking of 25% will be applied for each incorrect answer.
- Parents or legal guardians must ensure correct details are filled during online registration.
- Students must carry valid school ID or Aadhar card for verification if required.
- The online exam will be strictly AI-proctored to ensure fairness.
Technology requirements
- Desktop or Laptop with an inbuilt camera
- Stable internet connection
- No mobile phones or tablets allowed
- Web browser compatible with the examination platform
Fees and financial support
Fee details
The registration fee for Indian students is INR 250 + GST (approximately INR 300) for school registrations. For direct registrations by parents, the fee is INR 500 + taxes. For overseas students, the fee is USD 8. The highest fee is INR 500 + taxes.
Refund policy
Details regarding the refund policy are not explicitly provided and should be confirmed on the official NAC website.
About this opportunity
The National Astronomy Challenge (NAC) is India's largest Olympiad focused on Astronomy and Space Science, organized by Stem and Space. This online competition aims to inspire young learners, develop their understanding of astronomy and space science, and foster a competitive spirit. It provides a platform for students to explore celestial phenomena, planetary science, and the physics of space.
Students in Grades 4 to 9, typically aged 9 to 15, are eligible to participate. The challenge is open to students across India and overseas who have a keen interest in astronomy and space sciences. Participants can register through their schools, or individual students can register directly if their school is not participating.
Participants will gain valuable knowledge in astronomy, astrophysics, and integrated STEM subjects. Top performers receive national recognition, awards, and unique opportunities such as visits to ISRO facilities and leading space start-ups. All participants receive certificates, and comprehensive study materials are provided to aid in preparation.
The competition emphasizes critical thinking through image-based, video-based, and application-based multiple-choice questions. It encourages students to apply their understanding of astronomical concepts to real-world scenarios, offering an engaging learning journey beyond a traditional examination.
Exam format
- Total marks
- 100
- Duration
- 60 minutes
- Format
- Multiple Choice Questions (MCQs) including image-based, video-based, and application-based questions.
- Language
- English
Rounds and format
The competition consists of a single online examination round.
How entries are judged
Participants are evaluated based on their performance in the MCQ-based online exam. Scores determine national and school-level champions. A negative marking of 25% is applied for each incorrect answer.
Selection process
Selection is based on scores achieved in the online MCQ exam. Top performers are recognized as national and school-level champions.
How to prepare
- Access to immersive, multimedia-driven, grade-appropriate study materials through Cosmic Kids Club (now Spacetopia).
- Live webinars, monthly activities, and quizzes.
- Interactive content, videos, and comics on the Spacetopia platform.
- Self-paced free workshops powered by Stem and Space.
Academic details
Difficulty: Mixed Levels
What's covered
The curriculum covers a wide range of topics including celestial phenomena, planetary science, the physics of space, gravitational forces, light spectra, and the expanding universe. It integrates STEM subjects like mathematics and engineering relevant to spacecraft design and orbital mechanics, providing a holistic learning experience.
Frequently asked questions
What are the key strategies for students to excel in the National Astronomy Challenge?
Students can excel by focusing on conceptual understanding, practicing with sample papers, and utilizing the provided study materials on Spacetopia. Regular revision and effective time management during the exam are crucial for success.
How can participants manage competitive pressure and anxiety during the challenge?
Managing pressure involves adequate preparation, understanding the exam format, and practicing mindfulness techniques. Focusing on individual learning and growth rather than solely on ranks can also reduce anxiety.
What common mistakes should students avoid during their preparation for this astronomy competition?
Common mistakes include rote memorization without understanding concepts, neglecting weaker areas, and not practicing under timed conditions. It is important to review incorrect answers thoroughly to learn from them.
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