Casting a $20M Mirror for the World’s Largest Telescope [video]
Fun fact, this facility is underneath the football stadium at Arizona University.<p>Tom Scott recently posted a guest video from the Active Galactic Videos YouTube channel about this process.<p><a href="https://www.youtube.com/watch?v=BP9HNVuGb-g" rel="nofollow">https://www.youtube.com/watch?v=BP9HNVuGb-g</a>