The Hindu : Page 07
Syllabus : GS 3 : Science & Technology
A Dyson sphere is a theoretical structure proposed by Freeman Dyson to capture a star’s energy for advanced civilizations.
- It consists of a shell or swarm of solar panels surrounding a star, and its presence could be detected by excess infrared radiation.Recent searches have found unexplained infrared emissions from several stars.
What is a Dyson Sphere:
- A Dyson sphere is a theoretical megastructure proposed by physicist Freeman Dyson.
- Its purpose is to capture and harness the entire energy output of a star to meet the needs of a highly advanced civilization.
- The concept involves constructing a shell or swarm of solar panels or energy collectors around the star.
- The collected solar energy would be converted to usable power for the civilization.
- Dyson spheres are expected to emit excess heat as infrared radiation, detectable by astronomers.
- The idea suggests that if we detect unusual infrared signatures, it might indicate the presence of such a structure and, by extension, intelligent life.
- Recent searches of stars within 1,000 light years have identified seven stars with unexplained infrared emissions, potentially hinting at Dyson spheres, but no conclusive evidence has been found.
Who was Freeman Dyson (1923-2020)?
- Dyson was a renowned British-American theoretical physicist and mathematician known for his work in quantum electrodynamics, solid-state physics, and astronomy.
- Born on December 15, 1923, in England, he made significant contributions to science and technology, including the Dyson Sphere concept—a hypothetical structure that could encompass a star to capture its power output.
- He was also a prominent futurist and author, exploring ideas on space travel, extraterrestrial life, and the future of humanity.
- Dyson spent much of his career at the Institute for Advanced Study in Princeton and was known for his interdisciplinary approach to science.
UPSC Prelims PYQ : 2015
Ques : The term ‘Goldilocks Zone’ is often seen in the news in the context of
(a) The limits of habitable zone above the surface of the Earth
(b) Regions inside the Earth-like planets in outer space
(c) Search for the Earth-like planets in outer space
(d) Search for meteorites containing precious metals
Ans: c)
