NASA will reveal new imagery of the interstellar comet 3I/ATLAS. Watch it live.

NASA is throwing a cosmic show-and-tell this Wednesday, Nov. 19 at 3 p.m. EST, giving the world a closer look at Comet 3I/ATLAS — only the third known object ever caught cruising into our solar system from another star system. Discovered on July 1 by the NASA-funded ATLAS survey, this interstellar visitor isn’t a threat (it won’t come closer than about 170 million miles to Earth), but it did swing within 19 million miles of Mars in early October, making it prime real estate for spacecraft and telescopes to study. During a live broadcast from NASA’s Goddard Space Flight Center, top agency leaders — including Amit Kshatriya, Nicky Fox, Shawn Domagal-Goldman, and Tom Statler — will walk viewers through images and data captured from across the solar system and from ground-based observatories, showing how these different vantage points let scientists watch the comet almost continuously as it glides through our “neighborhood.” One highlight: a Hubble image from July 21, 2025, revealing a dramatic teardrop-shaped dust cocoon surrounding the comet’s icy nucleus, a clue to how interstellar comets shed material and evolve in sunlight. The event, streaming on NASA+, the NASA app, the agency’s website, YouTube, Amazon Prime, and via Space.com, isn’t just for scientists or reporters — the public can jump into the conversation by using #AskNASA on social media, with some questions answered live on air, turning a rare interstellar flyby into a shared, real-time discovery moment for everyone watching back on Earth.