“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 … Continue reading January 20, 2024 ALP Astronomy Experts Speaker Series featuring Dr. Michael E. Brown