Unexpected Atmospheric Gas on Exoplanet K2-18b
On 16th April 2025, astronomers recently announced the discovery of dimethyl sulfide (DMS) in the atmosphere of K2-18b, an exoplanet orbiting a star 120 light-years away.
- This gas, on Earth, is mainly produced by marine algae, and its presence on K2-18b suggests the intriguing possibility of life.
Dimethyl Sulfide (DMS)
- A sulfur-containing compound primarily emitted by biological organisms, particularly marine algae.
- On Earth, DMS is a strong indicator of biological activity, though it can have a few nonbiological sources.
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K2-18b
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