Chankillo is a solar observatory in northern Peru that’s over 2500 years old. It’s now been named a UNESCO World Heritage Site. There’s a good description of the site and how it may have been used here, including descriptions of the thirteen towers that were integral to it’s purpose.
JAA will be meeting tonight at the Pearl Library, 6:15 PM. We’ll be watching a presentation on the creation of galaxies from Case Western Reserve University.