JWST Maps Buckyballs Concentrated in a Thin Spherical Shell Around a Dying Star, 16 Years After Their First Detection in Space
A Western University team led by Jan Cami used JWST's MIRI instrument to image planetary nebula Tc 1, finding C60 buckyballs confined to a hollow shell around the white dwarf and revealing an unexplained question-mark structure at the center.
Overview
Astronomers using the James Webb Space Telescope have produced the first detailed picture of where cosmic buckyballs live. According to a Western University announcement on April 22, 2026, a team led by physics and astronomy professor Jan Cami imaged the planetary nebula Tc 1, located more than 10,000 light-years away in the constellation Ara, and found that the C60 fullerene molecules nicknamed “buckyballs” are concentrated in a thin spherical shell around the dying star at its center rather than spread randomly through the nebula.
The observations were made with JWST’s Mid-Infrared Instrument (MIRI) and are the same team’s follow-up to their 2010 detection of buckyballs in the same object using the Spitzer Space Telescope, as reported by Phys.org.
What We Know
The MIRI imaging combined nine filters spanning wavelengths from 5.6 to 25.5 microns, well beyond what the human eye can detect, according to Phys.org. That spectral coverage allowed the team to map temperature, density, chemical composition, and gas motions across the nebula, and to use integral field unit spectroscopy to capture chemical fingerprints throughout the structure, as reported by Western University.
The headline result concerns the geometry of the buckyball population. PhD candidate Morgan Giese described the arrangement as “buckyballs arranged like one giant buckyball,” according to Phys.org, referring to the way the C60 molecules are confined to a hollow shell around the central star. The star itself is a white dwarf, the dense remnant core of a dying sun-like progenitor, as reported by Scientific American.
The new images also revealed an unexpected feature. Scientific American reports that the data show “an upside down question mark” formation near the nebula’s center whose origin remains unexplained. The wider nebula displays delicate rays, wispy filaments, and shimmering gas shells, according to Western University.
Cami summarized the team’s reaction in remarks reported by Space.com: “The structures we’re seeing now are breathtaking, and they raise as many questions as they answer.”
Buckyballs were first identified in the laboratory in 1985 and confirmed in space by Cami’s group in 2010 using Spitzer, as reported by Phys.org. Each molecule is a hollow cage of 60 carbon atoms arranged in pentagons and hexagons, the same pattern as a soccer ball. The new JWST data represent the first detailed examination of a planetary nebula at this resolution, according to Space.com.
What We Don’t Know
Several pieces of the picture remain open. The origin of the upside-down question mark feature near the center of Tc 1 has not been explained, according to Scientific American. The team also found that current models cannot accurately predict the infrared emissions from C60 molecules in this environment, suggesting unknown physical processes are at play, as reported by Space.com.
The announcements describe the JWST observations as combining imaging and rich spectroscopic data, with several scientific papers currently in preparation, according to Western University. Detailed peer-reviewed measurements of shell thickness, C60 abundance, and the chemistry coupling fullerenes to other carbon species in the nebula will follow in those forthcoming papers.
Why It Matters
Fullerenes sit at the boundary between the inorganic carbon chemistry of stellar outflows and the complex organic chemistry that ultimately seeds planets. Mapping where C60 forms, where it survives, and how it is distributed around a dying star is directly relevant to understanding how carbon-rich molecules are dispersed into the interstellar medium. The Tc 1 result narrows that picture in a concrete way: the buckyballs are not everywhere in the nebula. They live in a defined shell near the white dwarf, and any model of how they form and propagate will need to reproduce that geometry.
The observations follow earlier Machine Herald reporting on JWST’s role in stress-testing planetary formation models, and continue a pattern in which MIRI’s mid-infrared sensitivity is reshaping what astronomers can resolve in dusty, molecule-rich environments.