UPSC Notes

Space Debris

PYQs

8

Articles

1

Momentum

21

Phase IFoundation

Background

Overview

The increasing amount of space debris threatens the long-term sustainability of outer space activities, impacting global communication, navigation, and scientific research. UPSC examines India's role in space governance, technological solutions, and environmental implications of space exploration, making debris management a critical topic.

Space debris refers to defunct man-made objects in space that no longer serve a useful function, including spent rocket stages, non-functional satellites, and fragments from collisions. These objects pose a significant threat to operational spacecraft and can impact celestial bodies, raising concerns about the long-term sustainability of space activities.

Phase IIStatic core

Facts & tables

Key facts

Origin

Spent rocket stages, defunct satellites, fragments from anti-satellite tests and collisions (e.g., Iridium-Cosmos collision).

Risks

Potential for damage to operational satellites, threat to human spaceflight, and the 'Kessler Syndrome' (cascading collisions).

Mitigation Strategies

International guidelines (e.g., IADC guidelines), active debris removal technologies, 'design for demise' for satellites, and de-orbiting spent stages.

Tracking

Global networks of ground-based radars and telescopes, as well as space-based sensors, are used to track larger debris objects to prevent collisions.

Reference table

Static syllabus anchors

TypeReference
Conceptual areaScience & Technology

Reference table

Institutions & roles

BodyRole
NASATracks and researches space debris, develops mitigation technologies
Indian Space Research Organisation (ISRO)Tracks debris, implements mitigation strategies for indian missions
Inter-Agency Space Debris Coordination Committee (IADC)International forum for space debris research and mitigation guidelines
Phase IIIExam lens

Prelims angle

Overview

Prelims angle: Multi-statement analysis

Prelims angle: Factual recall

Quick revision

  • Man-made objects in space that no longer serve a purpose.
  • Sources include rocket stages, defunct satellites, and collision fragments.
  • Risks: damage to operational satellites, human spaceflight, and Kessler Syndrome.
  • Mitigation: de-orbiting, active removal, and international guidelines (IADC).
  • Tracking is crucial for collision avoidance and monitoring impacts on celestial bodies.

High-confidence PYQs

Topic timeline

Science & Technology

NASA to track SpaceX rocket part as it crashes into Moon

05 Aug 2026 · Space debris is man-made junk in space, posing collision risks to active satellites and future missions. Mitigation involves international guidelines, active removal, and responsible design.

Read article

Related topics

Current topic

Space Debris

Practice writing on this topic

UPSC has asked 8 linked questions on Space Debris in Mains. Write an answer to one — and get it evaluated.

UPSC Prelims PYQs on Space Debris

Practice official previous year questions asked by UPSC related to this concept.

Consider the following pairs : Objects in space: Description 1. Cepheids: Giant clouds of dust and gas in space 2. Nebulae: Stars which brighten and dim peri...

2023·Science & Technology
Solve

Consider the following statements with regard to involvement of private entities in India's space programme : 1. The Indian National Space Promotion and Aut...

2026·Science & Technology
Solve

With reference to ‘Astrosat’, the astronomical observatory launched by India, which of the following statements is/are correct? 1. Other than the USA and Rus...

2016·Science & Technology
Solve

With reference to India’s satellite launch vehicles, consider the following statements: 1. PSLVs launch the satellites useful for Earth resources monitoring...

2018·Science & Technology
Solve

Which of the following statements about Rare Earth Elements (REEs) and Critical Minerals is/are correct ? 1. Modern technological innovations including Arti...

2026·Geography
Solve

“The experiment will employ a trio of spacecraft flying in formation in the shape of an equilateral triangle that has sides one million kilometres long, with...

2020·Science & Technology
Solve

Consider the following phenomena : 1. Light is affected by gravity. 2. The Universe is constantly expanding. 3. Matter warps its surrounding space-time. ...

2018·Science & Technology
Solve

Consider the following space missions: I. Axiom-4 II. SpaDeX III. Gaganyaan How many of the space missions given above encourage and support micro-gravity ...

2025·Science & Technology
Solve

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