Comet water ice carrying another star's chemistry is exactly the kind of data that keeps pushing our understanding forward.
Webb’s latest spectra of interstellar comet 3I/ATLAS reveal water-ice grains laced with dark refractory dust, offering a direct sample of chemistry formed around another star. Https://orbital-wire.com/astronomy-astrophysics/webb-finds-dust-rich-water-ice-interstellar-comet/