Science & Technology·Explained

International Space Station — Explained

Updated 10 Mar 2026

Detailed Explanation

The International Space Station (ISS) stands as humanity's most ambitious and successful endeavor in international space cooperation, a continuously inhabited orbital outpost dedicated to scientific research and technological development.

Since its inception, it has transcended geopolitical divides, fostering a unique environment for collaboration among nations. From a UPSC perspective, understanding the ISS involves not just its technical specifications but also its profound implications for international relations, scientific advancement, and the future trajectory of space exploration.

1. Origin and History: A Legacy of Cooperation

The genesis of the ISS can be traced back to the post-Cold War era, evolving from earlier concepts like the American Freedom Space Station and the Soviet Mir-2. The collapse of the Soviet Union presented an unprecedented opportunity for former adversaries to collaborate, leading to the formal establishment of the ISS program in 1993.

The project brought together the United States (NASA), Russia (Roscosmos), Europe (ESA), Japan (JAXA), and Canada (CSA), transforming competition into a shared vision for humanity's presence in Low Earth Orbit (LEO).

Key Milestones in Assembly:

November 20, 1998: Zarya (Functional Cargo Block) Launch. — This Russian-built, U.S.-funded module was the first component of the ISS, providing propulsion and guidance in its early stages. It was launched by a Russian Proton rocket.

December 4, 1998: Unity (Node 1) Launch. — The first U.S.-built component, Unity, was launched aboard Space Shuttle Endeavour (STS-88). It served as a connecting module for future U.S. and international modules.

July 2000: Zvezda (Service Module) Launch. — Another crucial Russian module, Zvezda, provided the station's initial living quarters, life support systems, and primary propulsion. Its docking to Zarya and Unity marked a significant step.

November 2, 2000: Expedition 1 Arrives. — The first long-duration crew, comprising American astronaut William Shepherd and Russian cosmonauts Yuri Gidzenko and Sergei Krikalev, docked with the ISS, marking the beginning of continuous human presence.

February 2001: Destiny Laboratory Module. — The U.S. Destiny module, a primary research laboratory, was added, significantly expanding scientific capabilities.

2002-2007: Truss Segments and Solar Arrays. — A series of complex spacewalks and shuttle missions installed the Integrated Truss Structure, which houses the massive solar arrays providing power to the station.

2008: Columbus and Kibo Modules. — ESA's Columbus laboratory and JAXA's Kibo (Japanese Experiment Module) were added, providing dedicated research facilities for European and Japanese scientists, respectively.

2010: Tranquility (Node 3) and Cupola. — The U.S. Tranquility module, providing additional life support and crew quarters, and the iconic Cupola, offering panoramic views of Earth, were installed.

2011: Alpha Magnetic Spectrometer (AMS-02). — A state-of-the-art particle physics detector was installed, searching for dark matter and antimatter.

2016: BEAM (Bigelow Expandable Activity Module). — An experimental inflatable habitat module was attached, testing expandable space habitat technology.

2021: Nauka (Multipurpose Laboratory Module). — Russia's long-delayed Nauka module, providing additional research space, crew quarters, and a new airlock, finally docked with the ISS.

2. Constitutional and Legal Basis: A Framework for Space Governance

The legal framework governing the ISS is a pioneering example of international space law. The cornerstone is the 1998 Intergovernmental Agreement (IGA), signed by the five partner governments. This treaty establishes:

Ownership and Control: — Each partner retains ownership of the elements it provides.

Jurisdiction: — Each partner exercises criminal jurisdiction over its personnel in or on its elements.

Intellectual Property: — IP generated on the ISS is governed by the laws of the originating partner state.

Cross-Waiver of Liability: — Partners agree not to sue each other for damages incurred during ISS activities, crucial for managing risks in a high-stakes environment.

Peaceful Purposes: — The ISS is dedicated to peaceful purposes, a fundamental principle of international space law.

Complementary Memoranda of Understanding (MOUs) between NASA and each partner agency (Roscosmos, ESA, JAXA, CSA) detail the specific responsibilities, interfaces, and operational procedures. This layered legal structure ensures smooth operations, resource allocation, and dispute resolution, setting a precedent for future large-scale international space projects.

From a UPSC perspective, the IGA and MOUs highlight the evolution of international space cooperation beyond the 1967 Outer Space Treaty, demonstrating practical mechanisms for shared governance of complex space assets.

3. Key Provisions and Practical Functioning

The ISS is a marvel of engineering, designed for modularity, redundancy, and long-term habitability.

Modules and Their Functions:

Russian Segment: — Zarya (storage, propulsion), Zvezda (service module, life support, crew quarters), Pirs (docking port, airlock - decommissioned 2021), Poisk (docking, airlock), Rassvet (docking, cargo), Nauka (multipurpose lab, airlock, crew quarters).

U.S. Orbital Segment (USOS): — Unity, Harmony, Tranquility (nodes, connecting modules), Destiny (U.S. lab), Columbus (ESA lab), Kibo (JAXA lab), Quest (airlock), Cupola (observation deck), Leonardo (Permanent Multipurpose Module - storage).

Truss Structure and Solar Arrays: — The Integrated Truss Structure (ITS) forms the station's backbone, supporting the massive solar arrays (eight total) that convert sunlight into electricity, providing up to 120 kilowatts of power.

Life Support Systems: The ISS features advanced Environmental Control and Life Support Systems (ECLSS) that recycle water (up to 93% efficiency), generate oxygen, remove carbon dioxide, and maintain atmospheric pressure and temperature. This closed-loop system is vital for long-duration missions.

Crew Rotation and Resupply:

Crew Transport: — Initially, Russia's Soyuz spacecraft was the sole crew transport vehicle. Since 2020, SpaceX's Crew Dragon (under NASA's Commercial Crew Program) has also transported astronauts, restoring U.S. human spaceflight capability. Boeing's Starliner is also expected to join.

Cargo Resupply:

* Russian Progress: Uncrewed cargo spacecraft, routinely delivers fuel, water, food, and supplies. * SpaceX Cargo Dragon: The only commercial resupply vehicle capable of returning significant cargo to Earth.

* Northrop Grumman Cygnus: Uncrewed cargo spacecraft, burns up in the atmosphere upon re-entry. * JAXA H-II Transfer Vehicle (HTV) "Kounotori": Japanese cargo vehicle, now succeeded by HTV-X, also burns up on re-entry.

* ESA Automated Transfer Vehicle (ATV): European cargo vehicle, now retired.

Robotics: The Canadarm2 (Mobile Servicing System) is a 17.6-meter robotic arm crucial for station assembly, maintenance, and grappling visiting spacecraft. It is complemented by the Dextre (Special Purpose Dexterous Manipulator), a two-armed robot for delicate tasks, and the Japanese Experiment Module Remote Manipulator System (JEMRMS) for Kibo module operations.

4. Scientific Experiments: Unlocking Microgravity's Secrets

The ISS is a unique microgravity laboratory, enabling research across diverse scientific disciplines. The absence of significant gravitational forces allows scientists to observe phenomena differently, leading to breakthroughs with terrestrial applications.

Human Physiology and Health: — Studying the effects of long-duration spaceflight on the human body (bone density loss, muscle atrophy, fluid shifts, radiation exposure, psychological impacts) is crucial for future deep-space missions. Experiments focus on countermeasures, nutrition, and exercise regimes.

Biology and Biotechnology: — Research on plant growth, microbial behavior, cell cultures, and protein crystallization in microgravity provides insights into fundamental biological processes, drug development, and sustainable life support systems.

Materials Science: — Understanding how materials form and behave without convection or sedimentation allows for the development of new alloys, crystals, and manufacturing processes with improved properties.

Fluid Physics: — Studying fluid dynamics in microgravity reveals new insights into combustion, heat transfer, and capillary action, relevant for engine design and industrial processes.

Earth Observation and Space Science: — The ISS serves as a stable platform for Earth observation instruments, monitoring climate change, natural disasters, and ecological shifts. External payloads like the Alpha Magnetic Spectrometer (AMS-02) conduct fundamental physics research, searching for dark matter and antimatter.

Technology Demonstrations: — Testing new technologies for future missions, such as advanced life support, robotics, autonomous systems, and propulsion methods, is a continuous activity.

5. Criticism and Challenges

Despite its successes, the ISS has faced criticism:

Cost: — The estimated total cost of the ISS project has exceeded $150 billion, making it one of the most expensive single objects ever built. Critics argue these funds could have been better spent on robotic missions or terrestrial research.

Scientific Return vs. Cost: — Some argue that the scientific output, while significant, does not always justify the immense financial investment compared to automated probes.

Geopolitical Vulnerabilities: — The reliance on international partners, particularly Russia, has exposed the ISS to geopolitical tensions, as seen during the Ukraine conflict, raising concerns about its operational stability.

Limited Access: — The high cost and complexity mean access to the ISS for research is limited, primarily to the partner nations.

6. Recent Developments (Up to 2024)

Continued Operations and Extension Debates: — The ISS is currently approved for operations until 2030 by the U.S., Europe, Japan, and Canada. Russia has indicated its intention to withdraw after 2028, potentially impacting the station's long-term viability. The final decommissioning is planned for 2031.

Commercialization of LEO: — NASA is actively pursuing the development of commercial Low Earth Orbit (CLO) destinations, aiming to transition from direct government operation of the ISS to purchasing services from private space stations. Several companies (e.g., Axiom Space, Orbital Reef, Starlab) are developing private modules or entirely new stations.

Increased Commercial Resupply and Crew Missions: — SpaceX's Crew Dragon and Cargo Dragon continue to be vital for ISS operations, with regular missions throughout 2023-2024. Northrop Grumman's Cygnus also maintains a steady cadence. Boeing's Starliner conducted its first crewed test flight in 2024, aiming for certification.

New Modules and Upgrades: — The Russian Nauka module, launched in 2021, has been integrated, providing new capabilities. Ongoing maintenance and upgrades ensure the station's structural integrity and operational efficiency.

Record-Breaking Stays and Spacewalks: — Astronauts continue to set records for cumulative time in space and perform complex spacewalks for maintenance and upgrades.

Vyyuha Analysis: Geopolitics, Cooperation, and Commercial Evolution

The International Space Station is more than just a scientific outpost; it's a profound geopolitical statement and a dynamic laboratory for international relations. Vyyuha's analysis suggests several critical angles for UPSC aspirants:

From Competition to Cooperation: — The ISS fundamentally represents a pivot from the Cold War space race (USA vs. USSR) to an era of unprecedented international collaboration. This shift demonstrates the potential for shared scientific goals to overcome political differences, though recent geopolitical tensions (e.g., Russia-Ukraine conflict) have tested this resilience. It highlights the concept of "soft power" through scientific diplomacy.

A Model for Global Governance in Space: — The IGA and MOUs serve as a blueprint for managing complex, multi-national assets in the common domain of space. The legal framework for ownership, jurisdiction, and liability is a crucial precedent for future endeavors, including lunar bases or Mars missions, where similar challenges will arise. This is directly relevant to understanding "international space cooperation agreements" .

The Rise of Commercial Space: — The planned decommissioning of the ISS and the transition to commercial LEO destinations (CLDs) signify a paradigm shift. Governments are moving from being operators to customers, fostering a new space economy driven by private enterprise. This commercialization promises to reduce costs, increase access, and accelerate innovation, aligning with the broader trend of "commercial space activities" .

Strategic Implications for India: — India, with its ambitious Gaganyaan program and growing space capabilities, stands at a crucial juncture. While not an original ISS partner, the commercial transition offers new avenues for collaboration, potentially through purchasing services on future CLDs or contributing specialized modules. This aligns with India's broader space diplomacy and its aspiration to establish its own space station.

Technological Spin-offs and Terrestrial Benefits: — The sheer complexity of building and operating the ISS has driven innovation in materials science, life support systems, robotics, and remote operations. These "space technology applications" have significant spin-off benefits for Earth, from water purification systems to advanced medical imaging, demonstrating the tangible returns on space investment.

7. Inter-Topic Connections

The ISS is deeply intertwined with several other UPSC syllabus topics:

Space Exploration : — As a precursor to deeper space missions (Moon, Mars), the ISS provides invaluable data on long-duration human spaceflight.

Satellite Technology : — The ISS itself is a sophisticated satellite, and its operations rely heavily on communication and navigation satellites.

Space Treaties : — The IGA is a prime example of how international law governs activities in outer space, building upon the Outer Space Treaty.

Space Science Applications : — The microgravity research conducted on the ISS directly contributes to advancements in various scientific fields, from medicine to materials science.

Private Space Companies : — The increasing role of companies like SpaceX and Northrop Grumman in resupply and crew transport, and the development of commercial space stations, highlight the evolving landscape of space commerce.

Space Debris : — The eventual decommissioning of the ISS, planned for a controlled re-entry, is a critical exercise in responsible space debris management.

8. Planned Decommissioning Timeline and Commercial Transition

The current operational lifespan of the ISS is planned to extend until 2030, with a controlled de-orbit and re-entry into the Earth's atmosphere targeted for early 2031. This complex maneuver will involve using the propulsion systems of visiting spacecraft (likely Progress vehicles) to guide the station to a remote area of the South Pacific Ocean, known as Point Nemo, to minimize risk to populated areas.

The transition from the ISS is a strategic move by NASA and its partners to foster a robust commercial ecosystem in LEO. The goal is to shift government resources from operating a single station to purchasing services from multiple commercial space stations.

This approach is expected to reduce costs for taxpayers, stimulate innovation, and allow NASA to focus on deep-space exploration missions like Artemis (lunar exploration missions ).

Axiom Space: — Plans to attach commercial modules to the ISS initially, then detach to form a free-flying station.

Orbital Reef (Blue Origin/Sierra Space): — A planned "business park" in space.

Starlab (Voyager Space/Airbus): — A continuously crewed free-flying station.

9. India's Potential Future Involvement and Options

India, through ISRO, has expressed its ambition to establish its own space station by 2035, following the Gaganyaan human spaceflight program. While India was not an original ISS partner, the evolving landscape presents several avenues for future engagement:

Scientific Collaboration: — Indian scientists could potentially conduct experiments on the ISS or future commercial LEO destinations, leveraging existing infrastructure.

Astronaut Training: — Collaboration on astronaut training programs could benefit India's Gaganyaan mission, drawing on decades of ISS experience.

Module Contribution: — In the long term, India could potentially contribute a module or specialized instrument to a future international or commercial space station, showcasing its growing technological prowess.

Data Sharing and Earth Observation: — Enhanced data sharing from ISS Earth observation payloads could benefit India's climate and environmental monitoring efforts.

Diplomatic Engagement: — India's participation in global space forums and its growing "space diplomacy" could position it as a key partner in future multilateral space endeavors. The transition to commercial stations might lower the barrier to entry for new partners like India.

The ISS, therefore, is not just a relic of past cooperation but a dynamic entity whose future trajectory, including its decommissioning and the rise of commercial successors, will profoundly shape the next chapter of human spaceflight and international relations in space.

Often confused with

Side-by-side differences the UPSC paper likes to test.

International Space Station vs Chinese Tiangong Space Station

Aspect	International Space Station	Chinese Tiangong Space Station
Operational Status (as of 2024)	International Space Station (ISS)	Chinese Tiangong Space Station
Ownership/Partnership	Multinational (USA, Russia, ESA, Japan, Canada)	China (CNSA) - primarily national, limited international cooperation
Launch Year (Core Module)	1998 (Zarya)	2021 (Tianhe)
Size/Mass (Fully Assembled)	Largest artificial structure in space (~420 tons)	Significantly smaller (~70-100 tons)
Crew Capacity	Typically 6-7 astronauts (can accommodate up to 13 temporarily)	Typically 3 astronauts (can accommodate up to 6 temporarily)
Operational Lifespan	1998 - 2030/2031 (planned decommissioning)	2021 - ~2037 (planned 15-year operational life)
Research Focus	Broad range: human physiology, biology, materials, fluid physics, Earth observation, technology demos	Similar broad range, with emphasis on space medicine, microgravity science, and Earth observation
Orbital Altitude/Inclination	~408 km, ~51.6 degrees	~390 km, ~41.5 degrees
Resupply Options	Russian Progress, SpaceX Cargo Dragon, Northrop Grumman Cygnus, JAXA HTV	Tianzhou cargo spacecraft
Crew Transport	Russian Soyuz, SpaceX Crew Dragon, (Boeing Starliner upcoming)	Shenzhou spacecraft
Legal Status/Governance	Governed by IGA and MOUs, complex multinational legal framework	Governed by Chinese national law, with bilateral cooperation agreements
Strategic/Geopolitical Implications	Symbol of post-Cold War cooperation, now facing geopolitical strains and commercial transition	Symbol of China's independent space prowess, potential for future international collaboration (e.g., with Pakistan, ESA)

The International Space Station (ISS) and the Chinese Tiangong Space Station represent two distinct models of human presence in Low Earth Orbit. The ISS is a colossal multinational endeavor, a legacy of post-Cold War cooperation, with a broad scientific mandate and a complex legal framework.

Its impending decommissioning and transition to commercial platforms mark a significant shift. In contrast, Tiangong is primarily a national project, showcasing China's independent capabilities, though it is open to limited international collaboration.

While both serve as microgravity research platforms, the ISS is significantly larger, older, and involves a wider array of international partners. The comparison highlights differing geopolitical approaches to space exploration and the evolving landscape of orbital infrastructure.

Why it is tested: This comparison is vital for understanding the geopolitical dimensions of space exploration (GS-II) and the technological capabilities of major spacefaring nations (GS-III). It allows aspirants to analyze the shift from collaborative models (ISS) to independent national programs (Tiangong) and the implications for future international space cooperation, including India's role. It also sets the stage for discussing the future of LEO infrastructure beyond the ISS.

International Space Station vs Planned Commercial Space Stations

Aspect	International Space Station	Planned Commercial Space Stations
Operational Status (as of 2024)	International Space Station (ISS)	Planned Commercial LEO Destinations (CLDs)
Ownership/Funding Model	Government-owned and operated (NASA, Roscosmos, ESA, JAXA, CSA)	Privately owned and operated, with government (e.g., NASA) as anchor customer
Primary Purpose	Scientific research, technology demonstration, international cooperation	Commercial research, manufacturing, tourism, media production, government services
Target User Base	Partner government astronauts and scientists	Private companies, researchers, tourists, government agencies (as customers)
Cost Model	Direct government funding, cost-sharing among partners	Private investment, revenue generation from services, government contracts (e.g., NASA's CLD program)
Flexibility/Modularity	Highly modular, but design largely fixed by initial agreements	Designed for high flexibility, rapid upgrades, and diverse commercial applications
Operational Lifespan	1998 - 2030/2031 (planned decommissioning)	Post-2027 (expected initial operations), with long-term commercial viability
Geopolitical Role	Symbol of international cooperation, subject to inter-governmental relations	Primarily commercial, potentially reducing direct geopolitical tensions, but still influenced by national regulations
Access for New Entrants	Limited to original partners or specific agreements	Potentially broader access for new countries, private entities, and researchers through commercial contracts

The transition from the International Space Station (ISS) to planned Commercial Low Earth Orbit Destinations (CLDs) represents a fundamental shift in the paradigm of human spaceflight. While the ISS is a government-funded and operated scientific outpost, CLDs are envisioned as privately owned and managed platforms, with governments acting as anchor tenants or customers.

This shift aims to reduce the financial burden on taxpayers, stimulate innovation through market competition, and open up LEO to a wider range of commercial activities, from manufacturing to space tourism.

For UPSC, this highlights the growing role of 'private space companies' and the evolving economic models in space, with implications for accessibility, cost-efficiency, and the future direction of space policy.

Why it is tested: This comparison is critical for understanding the future of human spaceflight and the commercialization of space (GS-III). It helps analyze the economic rationale behind the transition, the role of public-private partnerships, and the potential for new business models in LEO. It also provides context for India's own space station ambitions and how it might engage with a commercially driven LEO ecosystem. Relevant for discussions on space policy, economic reforms in space, and technological advancements.

Questions students ask

10 answered on this topic.

What is the International Space Station (ISS)?

The International Space Station (ISS) is a large, modular space station (habitable artificial satellite) in Low Earth Orbit. It is a multinational collaborative project involving five participating space agencies: NASA (United States), Roscosmos (Russia), JAXA (Japan), ESA (Europe), and CSA (Canada).

Its primary purpose is to serve as a microgravity and space environment research laboratory where scientific experiments are conducted across various disciplines, contributing to our understanding of space and its effects on life and materials, while also developing technologies for future deep-space missions.

It has been continuously inhabited by humans since November 2000.

How many countries participate in the ISS?

Five primary space agencies representing 15 countries officially participate in the International Space Station project. These are: the United States (NASA), Russia (Roscosmos), Japan (JAXA), Canada (CSA), and the European Space Agency (ESA), which itself represents 11 member states (Belgium, Denmark, France, Germany, Italy, Netherlands, Norway, Spain, Sweden, Switzerland, United Kingdom).

While these are the core partners, many other countries contribute to or utilize ISS research through various agreements and scientific collaborations.

When will the ISS be decommissioned?

The International Space Station is currently planned for decommissioning around January 2031. NASA, ESA, JAXA, and CSA have committed to operating the station until 2030. Roscosmos has indicated its intention to withdraw from the partnership after 2028.

The decommissioning process will involve a controlled de-orbit, guiding the station to re-enter Earth's atmosphere over a remote area of the South Pacific Ocean (Point Nemo) to minimize risks to populated areas.

This timeline is subject to ongoing international agreements and technical feasibility.

What experiments are done on the ISS?

A wide array of scientific experiments are conducted on the ISS, leveraging its unique microgravity environment. These include research in human physiology (studying effects of space on bones, muscles, and organs), biology (plant growth, cell cultures, protein crystallization), materials science (developing new alloys and crystals), fluid physics (understanding fluid behavior without gravity), Earth observation (monitoring climate change and natural disasters), and technology demonstrations (testing new systems for future space missions).

The goal is to advance scientific knowledge and develop technologies beneficial for both space exploration and life on Earth.

How does the ISS maintain its orbit?

The ISS orbits Earth at an average altitude of approximately 408 kilometers (253 miles) in Low Earth Orbit (LEO). To counteract the subtle but continuous atmospheric drag that causes it to slowly lose altitude, the ISS periodically performs 'reboost' maneuvers.

These reboosts are typically carried out using the engines of visiting Russian Progress cargo spacecraft or the Zvezda service module's own engines. These controlled burns push the station to a higher orbit, ensuring its long-term stability and preventing it from re-entering the atmosphere prematurely.

The frequency of reboosts depends on solar activity and atmospheric density.

Which companies supply the ISS?

Several commercial companies play a crucial role in supplying the International Space Station with cargo and, more recently, crew. Key commercial providers include SpaceX, which operates both the Cargo Dragon (for supplies and return cargo) and the Crew Dragon (for astronaut transport) spacecraft.

Northrop Grumman operates the Cygnus spacecraft, delivering cargo to the ISS. In the past, Orbital Sciences (now part of Northrop Grumman) and Sierra Nevada Corporation also contributed. These commercial partnerships are part of NASA's strategy to foster a robust private space industry and reduce reliance on government-operated launch systems for LEO access.

What is the ISS replacement plan?

The primary replacement plan for the ISS involves a transition to commercially owned and operated Low Earth Orbit (LEO) destinations. NASA is actively supporting the development of several private space stations or modules, such as Axiom Space's commercial modules (which will initially attach to the ISS and later detach), Blue Origin/Sierra Space's Orbital Reef, and Voyager Space/Airbus's Starlab.

The goal is for NASA and other international partners to become customers, purchasing services on these commercial platforms rather than directly operating a government-owned station. This strategy aims to reduce costs and stimulate innovation in the commercial space sector, allowing government agencies to focus on deep-space exploration.

How long do astronauts stay on the ISS?

Astronauts typically stay on the International Space Station for approximately six months, forming what are known as Expedition crews. This standard duration allows for extensive scientific research, maintenance tasks, and adaptation to the microgravity environment, while also providing sufficient time for physiological recovery upon return to Earth.

However, some missions have been shorter (e.g., test flights) or significantly longer, with some astronauts spending a year or more on board to gather extended data on the effects of long-duration spaceflight, particularly in preparation for future missions to the Moon and Mars.

What are the geopolitical implications of ISS cooperation?

The ISS represents a unique model of post-Cold War international cooperation, demonstrating how shared scientific goals can bridge political divides. However, it is not immune to geopolitical tensions, as evidenced by strained relations between the US and Russia, particularly concerning the Ukraine conflict.

These tensions have raised questions about the long-term stability of the partnership and the reliability of Russian components. From a UPSC perspective, it highlights the delicate balance between scientific collaboration and national interests, the role of space diplomacy, and the potential for space assets to become points of leverage or cooperation in global politics.

The transition to commercial stations may alter these geopolitical dynamics.

What is India's potential role or interest in the ISS or future space stations?

India, through ISRO, is not an original partner in the ISS but has a growing interest in human spaceflight with its Gaganyaan program and plans for an indigenous space station by 2035. India could potentially collaborate with the ISS partners or future commercial LEO destinations through scientific experiments, astronaut training, or even by contributing specialized modules or instruments.

This engagement would offer valuable experience for India's own space station ambitions, foster international scientific exchange, and enhance India's standing in global space diplomacy. The shift to commercial space stations may provide more accessible pathways for India's participation.