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American Focus > Blog > Tech and Science > Stellar flares may hamper search for life in promising star system
Tech and Science

Stellar flares may hamper search for life in promising star system

Last updated: June 23, 2025 7:50 am
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Stellar flares may hamper search for life in promising star system
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The Search for Atmospheres around TRAPPIST-1 Star System Faces Challenges

Illustration of TRAPPIST-1, a red-dwarf star with at least seven orbiting planets

Mark Garlick/Alamy

The TRAPPIST-1 star system, with its seven orbiting planets, has long been a target for astronomers in the search for extraterrestrial life. However, recent findings suggest that the detection of atmospheres around these planets may be more challenging than previously anticipated due to radiation blasts from the star.

Discovered in 2016, TRAPPIST-1 is a red dwarf star located 40 light years away from Earth. Its proximity and the positioning of some of its planets within the habitable zone make it an ideal candidate for hosting life-sustaining conditions, such as liquid water.

Despite extensive observations using the James Webb Space Telescope, scientists have yet to identify atmospheres on any of the TRAPPIST-1 planets. A recent study led by Julien de Wit from the Massachusetts Institute of Technology revealed the presence of microflares emanating from the star at regular intervals, causing interference with observational techniques aimed at detecting planetary atmospheres.

By analyzing data from the Hubble Space Telescope, de Wit and his team attempted to detect hydrogen absorption signals that could indicate the presence of atmospheres. While no conclusive evidence was found, the researchers observed fluctuations in light intensity during observations, indicating the occurrence of short-lived radiation bursts known as microflares.

These microflares pose a challenge to astronomers as they disrupt the ability to gather sufficient data over time to analyze potential atmospheres. Additionally, the study suggested that one of the planets, TRAPPIST-1b, may be losing significant amounts of hydrogen from its atmosphere due to these radiation events.

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Ekaterina Ilin from the Netherlands Institute for Radio Astronomy noted that TRAPPIST-1’s level of activity, particularly in terms of flaring events, is higher than expected. This unpredicted behavior of the star complicates efforts to study the planetary atmospheres and raises questions about the long-term habitability of these worlds.

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