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There's also a 20-minute lecture from his Coursera course on the Solar System. https://www.youtube.com/watch?v=v-ktWBtt7sc&feature=youtu.be https://www.youtube
by MaysonL 9y ago
There's also a 20-minute lecture from his Coursera course on the Solar System.
https://www.youtube.com/watch?v=v-ktWBtt7sc&feature=youtu.be https://www.youtube.com/watch?v=v-ktWBtt7sc&feature=youtu.be