The Commonwealth Club of California invited me to give an illustrated public talk about the Moon on the occasion of the 50th anniversary of the first human steps on our neighbor world. The video record is now available free on the Web, so if you are any of your friends (or students) are interested, you can find it at: https://www.commonwealthclub.org/…/astronomer-andrew-frakno…
I wanted to speak not so much about the astronauts and their journey (which so many other media and articles are covering in vast depth) but about the Moon itself, and what we now know about it, 50 years later. Hope you enjoy.
An audio-only version of the talk is also available as a podcast, at: https://www.commonwealthclub.org/events/archive/podcast/astronomer-andrew-fraknoi-50-years-our-first-step
The photo shows the Moon in front of a full Earth as seen from millions of miles away by the Deep Space Climate Discovery Spacecraft in 2015.