Interstellar-Objects on Startgaze — Astronomy, Stargazing & Space Sciencehttps://www.startgaze.com/tags/interstellar-objects/Recent content in Interstellar-Objects on Startgaze — Astronomy, Stargazing & Space ScienceHugoen-usSat, 11 Jul 2026 07:46:00 +00003I/ATLAS: Webb's spectra point to an interstellar comet older than the Sunhttps://www.startgaze.com/posts/2026-07-11-3i-atlas-jwst-older-than-the-sun/Sat, 11 Jul 2026 07:46:00 +0000https://www.startgaze.com/posts/2026-07-11-3i-atlas-jwst-older-than-the-sun/Webb measured deuterium, CO₂ and methane in interstellar comet 3I/ATLAS. The isotopes point to a comet that formed 10–12 billion years ago, older than the Sun.