vt.physics on Instagram: "Why Is This Comet Bright Green? Comet C/2025 A6 (Lemmon), discovered earlier this year at Mount Lemmon, is becoming brighter as it moves closer to Earth and the Sun. It will pass nearest to Earth around October 21, and reach its closest point to the Sun on November 8. You may spot it in the evening sky later this month, especially near the bright star Arcturus. If predictions hold, it could become bright enough, around magnitude 3 to 4, to see with the naked eye from da

ESA - European Space Agency on Instagram: "The 3I/ATLAS comet update you’ve been waiting for! ☄️ On 3 October, our ExoMars Trace Gas Orbiter (TGO) turned its eyes towards interstellar comet 3I/ATLAS as it passed close to Mars. We will next get the opportunity to view the comet with our Juice spacecraft, which is on its way to Jupiter, during the peak activity at the end of October. Together with Mars Express, ExoMars TGO had the closest view of the comet of all of our spacecraft. It looked towar