The interstellar comet 3I/ATLAS carries a chemical fingerprint unlike anything in our Solar System, and it may have formed 10 to 12 billion years ago, before our Sun even existed, according to two papers published in the journal Nature.
HD 80606b has one of the most extreme orbits of any known exoplanet and the NASA/ESA/CSA James Webb Space Telescope just caught it getting flash-fried as it whipped past its star.