India becomes world's fourth nation to carry out successful space docking mission

BENGALURU, India — India on Thursday became the fourth nation in the world to achieve space docking, a technological milestone that underscores its ambitions to expand its share in the rapidly growing $400 billion global space market.

At around 9 a.m. IST (10:30 p.m. Wednesday ET), the Indian Space Research Organisation (ISRO) carried out the highly anticipated Space Docking Experiment (SpaDeX), a spokesperson for the agency said.

Two ISRO satellites, Target and Chaser — each roughly the size of a large refrigerator — successfully latched onto each other and unlatched after a series of complex orbital maneuvers.

The indigenous technology, crucial for satellite servicing, space station operations, and interplanetary missions, positions India to play a significant role in the commercial and exploratory frontiers of space.

“India has ambitious missions planned and to achieve those this is an important technology we have to have. Various missions like building a space station need assembly in space, which is not possible without space docking,” Indian astrophysicist Jayant Murthy said.

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The mission was postponed twice earlier — first because the docking process needed further validation through ground simulations, and later because of an issue arising from excess drift between the satellites.

SpaDeX, launched on Dec. 30 from India’s main spaceport, used an Indian-made rocket to deploy the satellites into orbit. Among various payloads and experiments were eight cowpea seeds ISRO had sent to space onboard the rocket to study plant growth in microgravity conditions, which germinated within four days of the launch of the mission.

The mission will also demonstrate the transfer of electric power between docked spacecraft, a capability vital for applications like in-space robotics, composite spacecraft control and payload operations post-undocking.

Such technologies are essential for missions requiring multiple rocket launches to achieve shared objectives.

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Space exploration and commercialization is a key part of Indian Prime Minister Narendra Modi’s efforts to position the country as a global superpower.

The successful SpaDeX mission “is a significant stepping stone for India’s ambitious space missions in the years to come,” Modi said on X on Thursday.

ISRO is focused on deep-space exploration and enabling private companies to commercialize the sector, with projects that include solar studies, orbital astronaut missions and planetary defense, in collaboration with NASA.

The stakes are significant. While the global commercial space market is expected to reach $1 trillion by 2030, India’s current share is just 2%, or $8 billion. The government aims to grow this to $44 billion by 2040.