Webb Telescope's Little Red Dots Divide Astronomers Over Origin

The James Webb Space Telescope was built to capture faint light from the first billion years after the Big Bang, and almost from its first images it turned up something researchers did not expect: tiny, blazing red pinpricks of light scattered across nearly every frame, according to Wired's republication of a Quanta Magazine report.

Scientists have spent three years trying to figure out what they are looking at. The objects, nicknamed "little red dots" since 2023, shine as brightly as entire galaxies while spanning just a single pixel in Webb's images, the report states. Now a new theory has split the field: that some of these dots are enormous stars with black holes growing inside them.

What Are the 'Little Red Dots' Webb Keeps Finding?

The objects first looked to astronomers like distant galaxies, according to the report. Researchers later concluded they more closely resembled the supermassive black holes found at the center of most galaxies — dark masses whose gravity pulls in surrounding gas and dust, producing hot, swirling rings of material that outshine the stars nearby. Because the dots appear only as single points of light, astronomers have had to infer their nature almost entirely from color and brightness, the report notes.

Why Do Some Scientists Call Them 'Black Hole Stars'?

In the spring of 2025, two separate astronomy teams reported observations of a pair of little red dots unlike anything previously cataloged, according to the Wired/Quanta report. "In all the millions of [observations] we've taken with ground-based telescopes, there's nothing that looks like these sources," said Anna de Graaff, a researcher at the Max Planck Institute for Astronomy in Heidelberg, Germany, who led one of the teams.

De Graaff's group and the second team proposed that the dots could be a previously undocumented kind of object: a massive, inverted clump of hydrogen gas that shines with the brightness of billions of suns while concealing a black hole at its core. They named the hypothesized object a "black hole star."

What New Evidence Points to Black Holes Forming Inside Stars?

A paper posted in September pushed the idea further, arguing that Webb may be capturing the formation of supermassive black holes as they form inside the cores of giant stars, according to the report. "There is a fundamentally new phenomenon afoot," said Rohan Naidu, an astronomer at the University of Hawai'i, who was not among the quotes attributed to the original 2025 teams but is cited in the report discussing the September findings.

De Graaff told Quanta she suspects many of the little red dots catalogued by Webb could be giant stars with black holes hidden inside them, rather than ordinary black holes surrounded by gas disks, the report states.

Why Is the Black Hole Star Theory Still Contested?

Not every astronomer studying the dots accepts the interpretation. "The field has gotten very polarized," said Anna-Christina Eilers, an astrophysicist at the Massachusetts Institute of Technology who studies little red dots, according to the report.

The disagreement traces back to the core limitation researchers face: each dot is a single point of light. Astronomers can measure its color and brightness, but little else, which leaves room for competing physical models to explain the same pixel, the report notes. Earlier hypotheses framed the dots as either young galaxies or conventional supermassive black holes feeding on surrounding matter — interpretations some in the field have not abandoned even as the black hole star theory gains attention.

What Happens Next in the Debate?

The September paper has triggered what the report describes as a flurry of follow-up research, with teams racing to test the black hole star hypothesis against rival explanations using additional Webb observations. Because little red dots turn up in nearly every deep-field image the telescope captures, researchers have no shortage of new targets to examine, according to the report.

For now, the disagreement remains unresolved. De Graaff's team and the second 2025 group converged independently on the same unusual interpretation, which has lent the black hole star idea credibility even among skeptics, the report states. But the lack of consensus among researchers like Eilers signals that the question of what, exactly, Webb is seeing in these dots is likely to remain open as more data arrives.

The full account of the research, including details on how the two teams reached their conclusions, is available via Wired's republication of the original Quanta Magazine report.