Radio telescopes scan K2-18b for aliens, find only Earth noise
GS3Economy · S&T · Environment · Security· Space technology (ISRO, missions)· Prelims·
Why in news
Astronomers used the Karl G. Jansky Very Large Array and MeerKAT telescope to scan exoplanet K2-18b for technosignatures, finding only Earth-based interference.
Background
The study targeted K2-18b, a 'Hycean' world (ocean-covered with a hydrogen-rich atmosphere). The search utilized the Karl G. Jansky Very Large Array (USA) and the MeerKAT radio telescope (South Africa) to detect potential extraterrestrial transmissions.
Facts for Prelims
- S&TK2-18b: An exoplanet identified as a potential Hycean world (ocean-covered with hydrogen-rich atmosphere).
- S&TKarl G. Jansky Very Large Array: A major radio astronomy observatory located in New Mexico, USA.
- S&TMeerKAT: Aradio telescope array located in South Africa used for deep-space observations.
- S&TTechnosignatures: Technological indicators of advanced civilizations, such as radio signals or laser pulses.
For Mains
Q. Discuss the technological and ethical implications of the Search for Extraterrestrial Intelligence (SETI) in the context of advancing space exploration and global scientific cooperation.
Dimensions to cover in your answer
- Signal contamination: Difficulty in distinguishing cosmic technosignatures from increasing terrestrial radio frequency interference
- Technological frontier: Advancement in high-sensitivity radio interferometry for detecting faint signals from distant exoplanets
- Policy framework: Lack of international consensus on 'Active SETI' protocols and planetary protection
Keywords: Technosignatures · Exoplanetary Science · Radio Astronomy · SETI · Hycean Worlds
More Science & Technology notes
- Indian Private Space Missions Face Setbacks but Validate Tech in Orbit · 23 July 2026
- Supreme Court scolds Rajasthan for "shameful" Jojari River pollution, halts industrial park project · 23 July 2026
- Over 37,000 Deaths on 6,358 Black Corridors on National Highways 2023-2025 · 23 July 2026
- Punjab to Introduce AI as Subject from Class I to XII Under Sarbat.AI Project · 23 July 2026
- Future wars can’t be fought by individual services: Air Chief at INS Malvan ceremony · 23 July 2026
- Adani Defence & Aerospace and the Defence Research and Development Organisation (DRDO) · 23 July 2026
This note is generated automatically from SatyaDheesh's news feed and mapped to the UPSC CSE syllabus. Check facts against the original report or PIB before using them in an answer.