A team of astronomers led by the University of Cambridge say they’re closer to a statistically significant scientific finding that would show that signs of life they’re detecting from the distant exoplanet dubbed «K2-18b» are no accident.
The astronomers used data from the James Webb Space Telescope, which has only been in use since the end of 2021, to detect chemical traces of dimethyl sulfide and/or dimethyl disulfide, which they say can only be produced by life such as phytoplankton in the sea. According to the university, «the results are the strongest evidence yet that life may exist on a planet outside our solar system.»
The findings were published this week in The Astrophysical Journal Letters and point to the possibility of an ocean on this planet’s surface, which scientists have been hoping to discover for years.
In the abstract for the research paper, the team says: «The possibility of hycean worlds, with planet-wide oceans and H2-rich atmospheres, significantly expands and accelerates the search for habitable environments elsewhere.»
K2-18b is 124 light-years away and and much larger than Earth (more than eight times our mass), but smaller than Neptune. The search for signs of even basic life on a planet like this increases that chances that their are more planets like Earth that may be inhabitable, with temperatures and atmospheres that could sustain human-like lifeforms.
The team behind the paper hopes that more study with the James Webb Space Telescope will help confirm their initial findings.
