April 29, 2026
In a development that has quietly rewritten the rules of modern astronomy, the James Webb Space Telescope (JWST) has completed a highly sensitive survey of the TOI-700 system, approximately 100 light-years from Earth, in an attempt to locate a “second Earth” moon. While the telescope successfully identified two Earth-like worlds in the habitable zone—TOI-700 d and TOI-700 e—astronomers have reported a highly unusual obstruction: they cannot confirm the moon’s existence because the star itself is acting as a cosmic fog machine. According to a new study published on the preprint server arXiv on April 25, 2026, the telescope detected a persistent anomaly that is physically blocking the view of these hidden moons, but the source is not a solid object. Rather, it is a turbulent “granulation” pattern on the surface of the parent star generating a type of interference known as red noise. This stellar activity is producing fluctuations that are more than double the amplitude of the signal a moon would emit, effectively blinding the most advanced observatory ever built to the potential presence of a satellite .
The search focused on TOI-700 d and TOI-700 e, planets that have been hailed as the best analogs to our own world. TOI-700 d is approximately 15% larger than Earth, while TOI-700 e is about 8% smaller, making them remarkably close in stature to our own planet . Because they orbit within the Goldilocks zone of their small, M-dwarf star—where temperatures could theoretically support liquid water—scientists had high hopes that these worlds might host natural satellites similar to our Moon, which plays a critical role in stabilizing planetary axes and climates. The research team, comprising scientists from MIT, Harvard University, and the University of Chicago, leveraged JWST’s incredible precision to refine the orbital measurements of these planets by an order of magnitude. *Dr. Ben Partridge of the Harvard-Smithsonian Center for Astrophysics noted, “We have achieved the sensitivity necessary to find these moons. In theory, James Webb can detect a brightness dip as small as 20 parts per million (ppm). An Earth-moon analog should be right there in the crosshairs.”* .
However, when the data was analyzed, the expected dip was nowhere to be found. Instead, the JWST recorded a persistent, “strange” fluctuation caused by stellar granulation—the violent boiling of plasma on the star’s surface. This star behaves less like a steady light bulb and more like a turbulent pot of lava, with granules rising and falling in a cycle of roughly 16 minutes . This specific activity generated a red noise signal with an amplitude of about 46 parts per million. Dr. Elena Vasquez, lead author of the arXiv study, explained the cosmic irony: “The star is boiling. That bubbling creates a changing pattern of bright and dim patches that masquerades as a signal. We are looking for the whisper of a moon, but the star is shouting at us. Ironically, the very sensitivity of Webb that we praised is now revealing the violent nature of stars in such detail that it creates a wall between us and the moons.” The 46 ppm noise completely drowns out the 20 ppm signal of a potential moon, meaning that even if a lunar twin is currently transiting the star right now, Webb cannot distinguish its shadow from the random boiling of the star’s surface .
Yet, in a twist of optimism, the “blockage” may be temporary. The researchers concluded that the existing dataset—the light curves already captured—may already contain the hidden moon. The obstruction is not physical but mathematical. Study co-author Dr. Marcus Thorne stated, “We have not ruled out the moon. We have ruled out our ability to see it with current algorithms. It is entirely possible that a ‘second Earth’ moon is lurking in that data, obscured by the star’s turbulent skin. We need to develop new algorithms to filter out the noise of the star itself.” The team has set a new threshold: currently, they can only rule out moons larger than Ganymede (the largest moon in our solar system) with orbital periods longer than two days. Smaller, Earth-like moons could be hiding in the blind spot, waiting for a computational breakthrough . For now, the search for habitable moons continues not by looking deeper into space, but by learning to inceput the chaotic light of the stars they orbit.
