An illustration of TRAPPIST-1b. Credits: NASA, ESA, CSA, J. Olmsted (STScI).

Astronomers Observe Solar Flares on TRAPPIST-1 Using James Webb

The implications of this discovery are far-reaching as understanding these flares could aid scientists in identifying distant planets which may harbor life.


In an unparalleled effort, astrophysicists using the James Webb Space Telescope (JWST) have achieved a detailed investigation of solar flares from the remote star TRAPPIST-1. This star, located a mere 40 light-years away from Earth, provides researchers new insights that could be pivotal in hunting for life-supporting, Earth-like exoplanets.

Harnessing the capabilities of the JWST, an international team successfully observed four solar flares originating from the volatile TRAPPIST-1. The implications of this discovery are far-reaching as understanding these flares could aid scientists in identifying distant planets which may harbor life.


“Because of JWST, it is the first time in history that we’ve been able to look for planets around other stars that have the sorts of secondary atmospheres you could find around, say, Earth, Venus or Mars,” shared Ward Howard, the study’s lead researcher and a NASA Sagan Fellow at CU Boulder.

The Challenge of Red Dwarfs

However, as Howard notes, this quest isn’t straightforward. A majority of the rocky exoplanets, which are prime candidates for life, revolve around M-dwarfs, also known as red dwarfs. These stars are notoriously explosive, emitting flares and intense radiation regularly. This activity can often overshadow the planets orbiting them, making observations challenging.

Describing the dilemma, Howard explained, that viewing a planet near a red dwarf resembles trying to capture a friend’s photo in a nightclub flooded with pulsating lights.

Separating Light for Clearer Images

In their research, Howard and his team not only observed the flares but also introduced a mathematical technique to distinguish the flare light from the star’s consistent radiance, akin to using a digital filter on a glaring smartphone image.


The outcome? Enhanced visibility of the planets and, crucially, their atmospheres.

“If we want to learn more about exoplanets,” Howard emphasized, “it’s really important to understand their stars.”

Focus on TRAPPIST-1: A Potential Habitable Zone

Astrophysicists have been intrigued by TRAPPIST-1 for a considerable time. Its proximity to Earth and the fact that it boasts three rocky planets in its habitable zone makes it a hotspot for research. The primary objective is to detect any signs of an atmosphere on these planets, a quest in which JWST plays an integral role.

Howard remarked on the significance of TRAPPIST-1’s planets, “Each one of these planets is truly precious.”

Yet, he cautioned that the volatility of stars like TRAPPIST-1 can distort observations. Without accounting for these flares, one might misinterpret the atmospheric composition.

In a remarkable first, the research team, using JWST, captured flares in specific infrared light wavelengths, offering an intricately detailed view of the flare’s life cycle. Through their analysis, they could exclude approximately 80% of the flare light from their observations.


Howard believes this is just the beginning, and the methodology developed could be applied to other similar star systems.

“With TRAPPIST-1, we have a really great opportunity to see what an Earth-sized planet around a red dwarf would look like,” Howard concluded.

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Written by Ivan Petricevic

I've been writing passionately about ancient civilizations, history, alien life, and various other subjects for more than eight years. You may have seen me appear on Discovery Channel's What On Earth series, History Channel's Ancient Aliens, and Gaia's Ancient Civilizations among others.

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