“The Search for Planet 9”20 January 2024, 10:00 a.m. Philippine Standard Time (02:00 UTC)By Dr. Michael E. Brown (Professor of  Planetary Astronomy, Caltech) In 2006, Pluto was demoted to a “dwarf planet”. Since then, a team of planetary scientists at the California Institute of Technology (Caltech) has been searching for a hypothesized planet on the … Continue reading January 20, 2024 ALP Astronomy Experts Speaker Series featuring Dr. Michael E. Brown