Robert Stencel is an emeritus professor of astronomy at the University of Denver, where he taught classes and managed the high altitude observatory atop Mount Evans, Colorado at 14,148 ft elevation. Dr. Stencel previously worked at NASA Houston and Greenbelt centers and at NASA Headquarters in Washington DC, prior to joining Denver University in 1993. His research includes the origin of the elements and light pollution solutions. You can find him on Twitter @epsilon_Aurigae. Website: https://mysite.du.edu/~rstencel/ Twitter: https://twitter.com/epsilon_aurigae   For show notes and transcript visit: https://kk.org/cooltools/r-stencel-professor-of-astronomy/   If you're enjoying the Cool Tools podcast, check out our paperback book Four Favorite Tools: Fantastic tools by 150 notable creators, available in both Color or B&W on Amazon: https://geni.us/fourfavoritetools