UPSC CSE 2026 Essay Paper Discussion
GS Paper 3 10 marks · 150w 9 min Hard

Kessler Syndrome and rising orbital congestion threaten the long-term sustainability of low Earth orbit. Discuss India’s contribution to space debris and the role of Project NETRA.

Subtopic: Sci-Tech · Space and IPR

Model answer outline

How to structure your answer

Introduction: ESA Space Debris Office (Annual Report 2024) tracks ~40,500 objects larger than 10 cm in Earth orbit; ISRO target of debris-free Indian missions by 2030 announced in 2024.

Body: 1) Indian debris share — PSLV-C37 upper stage and Mission Shakti 2019 ASAT debris; ISRO's IS4OM tracks 28,000+ objects. 2) Project NETRA — Bengaluru-based space situational awareness facility. 3) International framework — UN COPUOS LTS guidelines, Outer Space Treaty 1967.

Way forward: Active debris-removal demonstration mission; legally binding global ASAT moratorium; expand NETRA to deep-space tracking.

Full model answer

Written within the word limit

135 words · target 150 words · 9 min

Introduction: ESA's Space Debris Office Annual Report 2024 tracks ~40,500 objects larger than 10 cm in Earth orbit; ISRO announced a target of debris-free Indian missions by 2030 under the Debris Free Space Mission Initiative, addressing the Kessler 1978 cascade hypothesis.

Body: First, India's debris footprint includes the PSLV-C37 upper stage, fragments from Mission Shakti ASAT (27 March 2019), and Cartosat-2C debris (2017), each adding to LEO congestion. Second, Project NETRA — ISRO's space-situational awareness facility at Bengaluru, inaugurated in 2022 — and the IS4OM Control Centre now track 28,000+ catalogued objects with collision-avoidance analytics. Third, India is a party to the Outer Space Treaty 1967 and aligns with UN COPUOS Long-Term Sustainability Guidelines 2019; POEM-3 demonstrated controlled re-entry in 2024.

Way forward: Demonstrate an active debris-removal mission by 2030, push for a legally binding global ASAT moratorium at UN COPUOS, and expand NETRA into deep-space tracking under DoS.

Key points

What an examiner expects to see

  • ~40,500 objects >10 cm in orbit (ESA 2024)
  • ISRO debris-free missions target by 2030
  • Project NETRA inaugurated 2022 (ISRO)
  • IS4OM tracks 28,000+ objects
  • Mission Shakti ASAT 27 March 2019
  • UN COPUOS Long-Term Sustainability Guidelines 2019
Examples to use

Concrete cases, schemes and judgments

  • Cartosat-2C debris from 2017
  • POEM-3 controlled re-entry 2024
  • Kessler 1978 cascade hypothesis
Keywords / terms

Terminology to weave into the answer

Kessler Syndromespace debrisNETRAASATIS4OMCOPUOS
Sources to read

Primary sources and verified references

ESA Space Debris Office https://www.esa.int/Space_Safety/Space_Debris Anantam IAS — Kessler Syndrome https://anantamias.com/kessler-syndrome/ Anantam IAS — Bharatiya Antariksh Station https://anantamias.com/bharatiya-antariksh-station/

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