Greetings from Krittika, the Astronomy Club of IIT Bombay! We are thrilled to invite you to our session on IceCube and how it helped discover the origin of high-energy neutrinos and cosmic rays, featuring Francis Halzen, University of Wisconsin-Madison. Neutrinos are omnipresent in nature: every second, trillions of them pass through our bodies without us ever noticing. Despite how common they are, neutrinos are extremely difficult to detect owing to their low mass, lack of electric charge, and weak interactions with matter. The IceCube project at the South Pole melted 86 holes 2.5 km deep to build an enormous neutrino observatory. It is capable of detecting neutrinos at the highest energies while remaining sensitive to low-energy ones. It has discovered deep-space neutrinos with energies over a million times greater than those from particle accelerators. Join us for an exciting lecture by Francis Halzen, the Principal Investigator of the IceCube Collaboration, as he explores the IceCube telescope and discusses the discovery that high-energy neutrinos and cosmic rays originate from sources powered by supermassive black holes in active galaxies. EVENT DETAILS Mode: Online (MS Teams) Date: 15 July, 2026 (Wednesday) Time: 5:30 PM IST Meeting link: https://teams.microsoft.com/meet/46535431341556?p=Vm6E53GljO2k6Zdiga Meeting ID: 465 354 313 415 56 Passcode: zZ2ZB9sZ Further Details: https://www.instagram.com/p/DasPHSbJwVO/?igsh=NDExc2s0OGh5OTBz This talk is open to all. Best regards, Per Aspera, Ad Astra. Guru Jahnavi Madana | 77801 12348 Vihang Vidwans | 95279 58679 Krittika, The Astronomy Club of IIT Bombay Innovate.Tinker.Create Best Regards, Veeraditya Karan Parakh, General Secretary, Technical Affairs 2026-27 Indian Institute of Technology, Bombay Contact: +91 94490 007525 https://tech-iitb.org https://insti.app/org/techiitb