Dennis Mammana is an astronomy writer, author, lecturer and photographer working from under the clear dark skies of the Anza-Borrego Desert in the San Diego County backcountry. Contact him at dennis@mammana.com and connect with him on Facebook: @dennismammana. The opinions expressed are his own.
When you hear the phrase “once in a blue moon,” what do you think? If you’re like most people, you think of something that doesn’t happen often. So what exactly […]
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