NASA has formally invited ISRO to join its Moon Base programme, marking a significant milestone in India-US space cooperation. The collaboration covers lunar exploration, human spaceflight, and space technology development. This builds on earlier agreements including the 2023 NASA-ISRO joint statement signed during PM Modi's US visit and the ARTEMIS Accords, which India signed in June 2023. ISRO's potential role spans lunar surface operations, habitat development, and shared scientific missions, deepening strategic ties in the space domain.

This development sits at the intersection of two major exam-relevant themes: India's evolving space programme and international space law/diplomacy.

The Artemis programme is NASA's initiative to return humans to the Moon and establish a sustained lunar presence, including the Lunar Gateway — a planned orbital outpost around the Moon. India signing the Artemis Accords in 2023 was the foundational step; NASA's invitation to join the Moon Base programme is the operational follow-through.

The Artemis Accords are a set of non-binding bilateral agreements grounded in the 1967 Outer Space Treaty. They establish norms for responsible behaviour in space: transparency, interoperability, peaceful purposes, and the release of scientific data. India was the 27th signatory. Crucially, they are NOT a UN treaty — they are US-led bilateral agreements, which is a favourite distractor.

For ISRO's domestic context: ISRO is simultaneously developing Gaganyaan (India's first crewed mission, targeting 2026), LUPEX (Lunar Polar Exploration mission with JAXA), and has the Chandrayaan-3 success (August 2023, Shiv Shakti Point near south pole) as its recent landmark.

The Moon Base invitation tests whether aspirants understand that India's participation would require human spaceflight capability — linking Gaganyaan directly to lunar ambitions. The examiner will likely test Artemis Accords provisions, India's signatory status, or the distinction between Artemis Accords and the Outer Space Treaty.