Breaking News:Astronomers Found Dry Ice Inside a Dying Star’s Dusty Ring, And It Should Have Been Impossible– What Just Happened

This surprising discovery challenges long-held assumptions about the chemistry of dying stars. It suggests that even in regions flooded with intense radiation, fragile molecules can persist under the right conditions.

Planetary nebulae form when Sun-like stars exhaust their fuel and shed their outer layers, creating glowing shells of gas and dust around a hot core. These environments are typically seen as destructive, where radiation rapidly breaks apart complex molecules. Yet, the Butterfly Nebula appears to defy that expectation.

Located about 3,400 light-years away in the constellation Scorpius, NGC 6302, often called the Bug Nebula, has long intrigued astronomers due to its unusual structure and chemistry. Its twin lobes and dense dusty torus make it a striking and complex object, stretching out to at least 1.5 light-years in radius.

Webb Reveals Frozen Carbon Dioxide Inside a Stellar Graveyard

Using the Mid-Infrared Instrument aboard JWST, researchers examined the nebula’s central region, including its star and surrounding dusty torus. According to Interesting Engineering, the team identified clear spectral signatures of both gaseous and solid carbon dioxide.

The infrared data showed absorption features between 14.8 and 15.2 micrometers, indicating CO2 gas. More strikingly, a distinct double-peak absorption pattern between roughly 14.9 and 15.3 micrometers matched laboratory signatures of CO2 ice.

“We report a surprising discovery: the clear spectral signatures of cold CO2 gas and the presence of CO2 ice features,” the researchers stated, marking the first confirmed detection of CO2 ice in a planetary nebula.

This is particularly notable because carbon dioxide ice evaporates more easily than water ice, making its survival in such an environment highly unlikely.

A Chemically Rich Nebula Unlike Any Other

The Butterfly Nebula had already gained attention for its complex chemistry. Previous observations detected the methyl cation (CH₃⁺), a molecule linked to organic chemistry in space, as well as widespread polycyclic aromatic hydrocarbons (PAHs).

These compounds are often associated with cosmic dust and chemical evolution, hinting that NGC 6302 may serve as a natural laboratory for studying how molecules form and transform during the final stages of stellar evolution.

Researchers from the University of Western Ontario specifically targeted this nebula because of these unusual traits. They described it as “a particularly intriguing laboratory” due to its extreme environment and unexpectedly rich chemistry. The presence of both gas-phase and frozen CO2 adds another layer to this already complex picture.

A Dusty Torus Acting as a Cosmic Shield

One of the key findings is the role played by the nebula’s dense torus, a thick ring of dust surrounding the central star. This structure appears to shield certain regions from intense ultraviolet radiation, allowing fragile molecules like CO2 ice to survive.

According to the researchers, the ratio of gaseous carbon dioxide to ice differs significantly from what is observed in star-forming regions. This suggests that the processes governing ice formation or transformation in planetary nebulae are fundamentally different.

“The gas-to-ice ratio differs markedly from that observed in young stellar objects,” the team noted, pointing to distinct mechanisms at work in evolved stellar environments. These findings open a new perspective on how dying stars contribute material to the interstellar medium.