Examine the role of the Department of Science & Technology in sustaining long-term observational science in India, with reference to institutions like IIA and ARIES.

Observational science yields results only over decades, a horizon that market or project-based funding rarely tolerates. The Department of Science & Technology (DST) has sustained this horizon chiefly through autonomous institutes such as the Indian Institute of Astrophysics (IIA) and ARIES, whose century-long solar record remains globally rare.

Institutional continuity through autonomy

• IIA is an autonomous institute under DST; its field station, the Kodaikanal Solar Observatory (KoSO), established in 1899, has kept one of the longest continuous daily records of the Sun in the world [3].
• Sustained support let one campus produce both the Evershed Effect (1909) and present-day research, marking 125 years of unbroken observation in 2024 [3].
• ARIES, likewise autonomous under DST, led the 2026 study applying a U-Net machine-learning model to hand-drawn suncharts to map plages across nine solar cycles (1916–2007) [1].

Archives as public scientific infrastructure

• DST-funded digitisation converted over a century of observations into more than 120,000 openly accessible solar images [3], released via public repositories as a big-data source for AI/ML [4].
• This archival investment, not new instruments, made the AI reconstruction of past solar activity possible [1][4].

Enabling collaboration and future capacity

• The plage study joined ARIES, IIA, IIST and the Southwest Research Institute (USA); separate KoSO calcium-K work (2015–2025) drew in IIT-BHU and Amrita Vishwa Vidyapeetham [1][2].
• Forward capacity is being built through the Visible Emission Line Coronagraph for Aditya-L1 and the proposed National Large Solar Telescope in Ladakh [3].

Persisting constraints

• Outcomes depend on uninterrupted budgetary commitment, ageing instrumentation, and skilled staff retention; without continuity, a broken data series cannot be recovered retrospectively.

DST's contribution lies less in single discoveries than in protecting continuity, curating data as a public good, and linking legacy archives to frontier tools like AI. Assured multi-year funding and open-data mandates for all such observatories would deepen this strength, keeping India a dependable partner in global space-weather and climate science.