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In the newest episode of the Arizona Highways podcast, host Steve Goldstein and Arizona Highways editor Robert Stieve talk with Stephen Hummel — the astronomer-in-residence at Grand Canyon National Park — about the importance of dark skies and why Pluto was demoted to a dwarf planet.
By Arizona Highways Podcast Network4.8
2424 ratings
In the newest episode of the Arizona Highways podcast, host Steve Goldstein and Arizona Highways editor Robert Stieve talk with Stephen Hummel — the astronomer-in-residence at Grand Canyon National Park — about the importance of dark skies and why Pluto was demoted to a dwarf planet.

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