Peer-reviewed analyses of Palomar Observatory plates from 1950–1956, led by Dr. Beatriz Villarroel and Dr. Stephen Bruehl, identified over 100,000 light-reflecting objects in Earth’s orbit decades before satellites existed, with statistical patterns showing they behave like real physical objects rather than photographic defects. The studies also found a significant correlation between these “mirror-like” transients and nuclear detonations, suggesting possible responsive or monitoring activity by

About the legendary telescope at Palomar Mountain. Video for Palomar Observatory and its bilingual virtual tour: https://www.astro.caltech.edu/palomar/visitor/media/palomartour/ | Palomar Observatory

About the Palomar/Hale 200-inch mirror and its recoating process. Video for Palomar Observatory and its bilingual virtual tour: https://www.astro.caltech.edu/palomar/visitor/media/palomartour/ | Palomar Observatory | Facebook

Observatory Closure Notice The observatory will be closed to the public on Wednesday, 11/5, and Thursday, 11/6 while the 200-inch mirror is cleaned and re-aluminized. ✨ This special aluminizing process only happens every two years and is essential for keeping the telescope performing at its best. What is the aluminizing process like? It involves carefully removing, cleaning, and coating the giant mirror with a thin layer of aluminum to ensure maximum reflectivity — a truly fascinating behind-the

1.4K views · 110 reactions | The Hale Telescope dome is the central...