China schedules Shenzhou 20 manned spaceflight mission
Source:The Hindu ↗
Why It Matters
China's continuous operation of its space station with regular crew rotations showcases its self-reliance in space exploration. The focus on biological experiments in microgravity and the installation of space debris protection highlight crucial areas of scientific research and sustainable space infrastructure management relevant for global space policy.
Summary
China is set to launch its Shenzhou-20 manned spaceflight mission, carrying three astronauts to the Chinese space station for an in-orbit rotation with the Shenzhou-19 crew. The mission's tasks include installing a space debris protection device and conducting various life science experiments using zebrafish, planarians, and streptomyces in microgravity.
Key Points
- China will launch the Shenzhou-20 mission carrying three astronauts to the Chinese space station on April 24, 2025.
- The main objective is to complete an in-orbit rotation with the Shenzhou-19 crew, who are scheduled to return to the Dongfeng landing site on April 29.
- The astronauts will conduct space science experiments, install a space debris protection device, and manage extravehicular payloads and equipment.
- The mission includes biological research, carrying zebrafish, planarians, and streptomyces for life science experiments in the space station's microgravity environment.
Important Terms
Tiangong Space Station
China's modular space station in Low Earth Orbit (LEO), consisting of the Tianhe core module and Wentian/Mengtian lab modules. Also known as the 'Heavenly Palace'.
UPSC context
GS Paper 3 (Science & Tech); tests knowledge of global space infrastructure and international space cooperation/competition.
Shenzhou Program
China's primary crewed spacecraft series (meaning 'Divine Boat'), used to transport astronauts to the Tiangong space station via the Long March 2F rocket.
UPSC context
GS Paper 3 (Space Technology); relevant for milestones in human spaceflight and comparison with India's Gaganyaan mission.
Microgravity
The state of apparent weightlessness experienced in orbit where gravitational force is significantly reduced, allowing for unique biological and material science experiments.
UPSC context
GS Paper 3 (Science); fundamental for understanding orbital research and physiological challenges of long-duration space travel.
Space Debris Mitigation
A suite of technical and policy measures aimed at reducing the creation of orbital 'junk' (defunct satellites/spent stages) to ensure the long-term sustainability of space.
UPSC context
GS Paper 3 (S&T/Environment); critical for questions on orbital safety, Kessler Syndrome, and international treaties like the Liability Convention.
Kessler Syndrome
A theoretical scenario where the density of objects in orbit is high enough that collisions create a self-sustaining cascade of debris, making orbits unusable.
UPSC context
GS Paper 3 (Science); a core concept in space situational awareness and sustainable space exploration.
China Manned Space Agency (CMSA)
The government agency responsible for the administration and execution of China's human spaceflight program, including mission planning and astronaut training.
UPSC context
GS Paper 3 (Space Tech); tests identification of key international agencies driving global space developments.
Prelims Trap
Tiangong space station is a joint initiative of BRICS nations operating in low earth orbit.
Tiangong is China's independently developed space station. Unlike the International Space Station (ISS), it is not a multi-nation collaboration or a BRICS initiative.
Static Concepts Connected
What is the Kessler Syndrome and how is Space Debris managed?
- Kessler Syndrome: A theoretical scenario in Low Earth Orbit where the density of objects causes a runaway cascade of collisions, generating exponential space debris.
- Mitigation Measures: Include deorbiting old satellites, deploying active debris removal (harpoons, nets), and installing physical protection shields on space stations.
- India's NETRA: ISRO operates Project NETRA (Network for space object Tracking and Analysis) to provide early warning on space debris and hazards to Indian satellites.
Why are biological life-science experiments conducted in microgravity?
- Altered Gene Expression: Microgravity alters gene activation, allowing scientists to study accelerated cellular aging, muscle atrophy, and disease progression in unique ways.
- Protein Crystallization: Without gravity-induced convection, protein crystals grow larger and with fewer imperfections, which aids in advanced pharmacological drug design.
- Radiation Protection: Studying 'induced torpor' (hibernation) in organisms like zebrafish helps researchers develop metabolic and radioprotective solutions for astronauts on deep-space missions.
Cross-Topic Patterns
Tiangong vs. ISS vs. BAS
China's independent permanent human presence in LEO contrasts with the aging ISS (retiring ~2030) and sets the strategic context for ISRO's planned Bharatiya Antariksha Station (BAS) by 2035.
Space Debris & the Orbital Global Commons
The installation of debris shields links space tech to international relations (Outer Space Treaty), highlighting the urgent need for global governance to protect the orbital commons from the Kessler Syndrome.
Expect a comparative multi-statement question on Tiangong, ISS, and India's BAS, paired with microgravity biology applications.
Linked PYQs · 2
Linked PYQs · 2
- 2025PrelimsGS1
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 research?
- 2017MainsGS3
India has achieved remarkable successes in unmanned space missions including the Chandrayaan and Mars Orbitter Mission, but has not ventured into manned space missions. What are the main obstacles to launching a manned space mission, both in terms of technology and logistics? Examine critically.
