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Source — Source: IE ///Category — GS Paper 3 ///Published — 2026-02-14 ///Exam — Both Prelims and Mains ///Tags — Space Technology, Scientific Innovations & Discoveries, Science & Technology ///Source — Source: IE ///Category — GS Paper 3 ///Published — 2026-02-14 ///Exam — Both Prelims and Mains ///Tags — Space Technology, Scientific Innovations & Discoveries, Science & Technology ///

Source: IE · GS Paper 3

New Telescopes in Ladakh to Boost Space Research

The Union Budget 2026-27 has approved two world‑class telescopes – the National Large Solar Telescope (NLST) and the National Large Optical‑Near Infrared Telescope (NLOT) – in Ladakh, along with an upgrade of the Himalayan Chandra Telescope. These facilities will enhance India’s observational astronomy, space‑weather monitoring and global scientific stature, making them crucial for UPSC current‑affairs and policy analysis.

2026-02-14

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Source: IE

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Key Facts and Data Points

Telescopes approved: National Large Solar Telescope (NLST) – 2 m aperture; National Large Optical‑Near Infrared Telescope (NLOT) – 13.7 m segmented mirror; Upgrade of Himalayan Chandra Telescope (HCT) to 3.7 m segmented mirror.
Location: NLST – Merak region near Pangong Tso, Ladakh; NLOT & upgraded HCT – Hanle, Ladakh (Hanle Dark Sky Reserve).
Timeline: NLST operational in 5‑6 years; NLOT ready within a decade; HCT upgrade ongoing.
Funding: Sanctioned in Union Budget 2026‑27.
Scientific objectives:
NLST: Solar dynamics, magnetism, space‑weather (flares, CMEs) – synergy with ISRO’s Aditya‑L1 mission.
NLOT: Exoplanet detection, stellar evolution, supernovae, cosmology.
HCT upgrade: Transient astronomy, complementarity with LIGO‑India and SKA.

Background and Context

Ladakh’s high altitude (~4,500 m), dry and clear atmosphere offers minimal atmospheric turbulence, making it one of the world’s premier astronomical sites.
India already operates the Himalayan Chandra Telescope (2.01 m) and the Hanle Dark Sky Reserve.
The project leverages experience from the international Thirty Meter Telescope (TMT) collaboration, especially segmented‑mirror technology.

Significance for India / Governance / Policy

Strategic autonomy & data sovereignty: Indigenous high‑resolution astronomical data reduces dependence on foreign observatories.
Space‑weather capability: Real‑time monitoring of solar events safeguards satellites, navigation, power grids and launch vehicles.
Global South leadership: Provides preferential observation time to Indian and allied Global South scientists, enhancing diplomatic scientific cooperation.
Longitudinal advantage: At ~78° E longitude, NLST and NLOT fill a global time‑zone gap, enabling continuous sky monitoring.
Technology spill‑overs: Advanced optics, cryogenics, remote operations and high‑speed data links foster indigenous R&D and skilled manpower.

Related Constitutional / Legal Provisions

Article 48A of the Constitution (Directive Principle) encourages the State to protect and improve the environment – high‑altitude observatories must adhere to ecological safeguards.
Science and Technology Policy (1999, revised 2022) emphasizes self‑reliance in strategic scientific infrastructure.
Space Activities Act, 2023 provides a regulatory framework for space‑related research, including ground‑based facilities.

References

Union Budget 2026‑27 documents (Ministry of Finance)
ISRO releases on Aditya‑L1
International Astronomical Union (IAU) on Hanle Dark Sky Reserve