Space and Nuclear Programmes of India

The space programme

• The Indian Space Research Organisation (ISRO) was founded in 1969. Dr. Vikram Sarabhai is the father of India's space programme.
• Aryabhata (1975) was India's first satellite, launched by the Soviet Union.

Landmark missions

Orbits: Geostationary orbit is about 35,786 km above the equator (it appears fixed – used by communication satellites). Low Earth Orbit is below 2,000 km (used for imaging).

The three-stage nuclear programme (Homi J. Bhabha)

1. Pressurised Heavy Water Reactors (PHWR) use natural uranium and produce plutonium.
2. Fast Breeder Reactors use plutonium and "breed" more fuel. They also convert thorium into uranium-233.
3. Thorium-based reactors use U-233. India has large thorium reserves (monazite sands of Kerala and Odisha) but limited uranium.

• Other facts: Apsara (1956) was Asia's first research reactor. Nuclear tests were held at Pokhran in 1974 and 1998. India follows "No First Use" for nuclear weapons.

Background: from bullock carts to the Moon

India's space programme began in 1962 with INCOSPAR. Vikram Sarabhai led it, with the idea that space should serve national development – communication, weather forecasting, resource mapping. The first rocket was launched from Thumba (1963). ISRO was formed in 1969. Satellite milestones followed: Aryabhata (1975), SLV-3 (1980 – Rohini). India's nuclear programme was led by Homi J. Bhabha: the Atomic Energy Commission (1948) and BARC.

Launch vehicles

Orbits (simple guide)

Major missions

• Chandrayaan-1 (2008): helped find evidence of water molecules on the Moon (NASA's M3 instrument).
• Mars Orbiter Mission (2013): India was the first Asian nation to reach Mars orbit, and the first in the world to do so on its first attempt.
• Chandrayaan-3 (August 2023): first soft landing near the lunar south pole; India became the fourth country to soft-land on the Moon. The landing point was named "Shiv Shakti", and 23 August is National Space Day.
• Aditya-L1 (2023): the first Indian solar observatory, at L1.
• NavIC: India's regional navigation system (seven-satellite constellation; NVS series replacing the older satellites).
• Gaganyaan: the human spaceflight programme; uncrewed tests are progressing; an astronaut flew to the ISS on the Axiom-4 mission in 2025 (Shubhanshu Shukla).
• Space reforms (2020 onwards): IN-SPACe (authorisation and promotion of private players), NSIL (commercial arm), the Indian Space Policy 2023, and FDI liberalisation in 2024. Private launches: Skyroot's Vikram-S (2022), Agnikul's 3D-printed engine (2024).

India's three-stage nuclear programme

Bhabha designed it because India has little uranium but large thorium reserves (monazite sands in Kerala).

Other facts:

• Installed nuclear capacity is about 8 GW, with a target of 100 GW by 2047. The Nuclear Energy Mission (2025 budget) covers small modular reactors.
• Laws: the Atomic Energy Act 1962; the Civil Liability for Nuclear Damage Act 2010.
• Pokhran-I (1974) and Pokhran-II (1998).
• Nuclear doctrine: credible minimum deterrence, no first use, civilian command (the Nuclear Command Authority).
• The India–US civil nuclear deal (2008) and the NSG waiver.
• India is not a party to the NPT or the CTBT. It joined the MTCR (2016), the Wassenaar Arrangement (2017) and the Australia Group (2018); it is not yet in the NSG.

Causes and effects – why space matters

Benefits:

• weather forecasting and cyclone warnings (saving lives – Odisha's evacuation success);
• telemedicine, tele-education;
• fisheries advisories (potential fishing zones);
• crop estimation;
• disaster mapping;
• navigation;
• defence (the ASAT test Mission Shakti, 2019);
• commercial revenue and soft power.

Concerns: space debris, militarisation, funding, and the regulatory framework for private players.

Case study: Chandrayaan-3 – learning from failure

Chandrayaan-2's lander crashed in 2019 because of software and guidance issues during the descent. ISRO adopted a "failure-based design":

• a wider landing zone;
• stronger legs;
• more fuel;
• extra sensors;
• extensive testing.

Chandrayaan-3 landed successfully at a total cost of about ₹600 crore – low by global standards. It is a model in GS4 (resilience, team leadership) and essays on science and national confidence.

Common misconceptions

• "Geostationary and geosynchronous are the same." – Every geostationary orbit is geosynchronous, but only one above the equator with zero inclination keeps the satellite fixed in the sky.
• "India has abundant uranium." – It has modest uranium but large thorium reserves.
• "India is a member of the NSG." – India has a waiver (2008) but is not a member.

How UPSC asks it

Prelims asks about missions and their firsts, launch vehicles, orbits, NavIC, the three-stage programme, and export-control regimes. Mains themes include the commercialisation of space, the role of space technology in development, and nuclear energy in the energy transition.

Mains answer framework

Q-type: "Discuss the significance of opening the space sector to private players."

• Intro: the 2020 reforms; IN-SPACe, NSIL, the 2023 policy.
• Significance: innovation, a larger share of the global space economy, jobs, ISRO freed to focus on R&D and deep space, startups (Skyroot, Agnikul, Pixxel).
• Challenges: regulation, a liability law, funding, debris, security.
• Way forward: a space activities law, risk capital, procurement by government, international partnerships.
• Conclusion: from a state-led to an ecosystem-led space programme.

Practice question

Q. Explain India's three-stage nuclear programme. Stage 1: pressurised heavy water reactors using natural uranium, producing plutonium. Stage 2: fast breeder reactors using plutonium-based fuel, breeding more fissile material (the Prototype Fast Breeder Reactor at Kalpakkam). Stage 3: thorium-based reactors using uranium-233, to exploit India's large thorium reserves.

Check your understanding

1. What was achieved by Chandrayaan-3 (2023)? A soft landing near the lunar south pole region, making India the first country to land there.
2. What is IN-SPACe? A body set up in 2020 to promote and authorise private space activities.