Scientists detect “strongest evidence till date” of life outside our solar system
London: Astronomers have reported the strongest evidence yet of potential biological activity on a distant planet named K2-18b, located about 124 light-years away from Earth. The planet, which is more than twice the size of Earth, has shown signs of atmospheric molecules that, on Earth, are produced only by living marine organisms.
The discovery was made by an international team of scientists led by Indian Origin scientist Dr. Nikku Madhusudhan of the University of Cambridge. Using data collected by NASA’s James Webb Space Telescope, the team analyzed the chemical composition of the planet’s atmosphere. They found molecular signatures that suggest the possible presence of life-supporting processes.
“This is certainly the strongest sign we have seen yet,” said Dr. Madhusudhan in a television interview. “I can realistically say that we could confirm this signal within one or two years.” He added that if life is found on K2-18b, it could point to the likelihood of life being common across the galaxy.
The planet K2-18b is located in the habitable zone of its host star, a red dwarf. This is the region where temperatures could allow for the existence of liquid water—a key ingredient for life. The planet is about 2.5 times the size of Earth and sits roughly 700 trillion miles away.
The James Webb Space Telescope, launched in 2021, is equipped to detect and analyze the faint light that passes through a planet's atmosphere as it transits its star. This allows scientists to identify the presence of specific molecules. In the case of K2-18b, the molecules detected appear to be those that, on Earth, are associated with biological activity.
However, experts are urging caution. While the findings are promising, they remain inconclusive. The scientific team is in the process of preparing a detailed paper on the discovery and is expected to seek further observations to validate the results.
Catherine Heymans, the Astronomer Royal for Scotland, noted that even more detailed data might not provide a definite answer. “Even with perfect data, you still won’t be able to say that this is definitely of biological origin,” she said. “There are many unknowns in the universe, and other non-biological processes could produce similar signatures.”
The research team hopes that continued observations using the James Webb Space Telescope and other advanced instruments will offer greater clarity in the coming years.
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RCB pip CSK by two runs in last-ball IPL thriller
Bengaluru: Ayush Mhatre's 94 and Ravindra Jadeja's 77 not out went in vain as Royal Challengers Bengaluru pipped Chennai Super Kings by two runs in their IPL match here on Saturday.
Chasing 214, CSK scored 211 for 5 in their 20 overs.
Mhatre scored a 48-ball 94 with five sixes and nine fours while adding 114 runs with Jadeja (77 not out off 45 balls, 8x4s, 2x6s) for the second wicket.
For RCB, Lungi Ngidi returned with figures of 3/30.
Earlier, half-centuries from Jacob Bethell (55), Virat Kohli (62) and Romario Shepherd (53 not out) took RCB to 213 for five.
While Bethell and Kohli put on 97 runs for the opening wicket to set a platform, Shepherd blasted four fours and six sixes to make 53 not out off only 14 balls, recording the fastest fifty of the season and joint second-fastest overall.
For CSK, Matheesha Pathirana found his rhythm and lengths to return 3-0-36-3.
Brief scores:
RCB: 213 for 5 in 20 overs (Jacob Bethell 55, Virat Kohli 62, Romario Shepherd 53 not out; Matheesha Pathirana 3/36).
CSK: 211 for 5 in 20 overs (Ayush Mhatre 94, Ravindra Jadeja 77 not out; Lungi Ngidi 3/30).
