About Dennis Mammana

Dennis Mammana

Dennis Mammana

For more than three decades, Dennis Mammana has shared the wonder and mystery of the cosmos with audiences around the world. With a B.A. in physics from Otterbein College and an M.S. in astronomy from Vanderbilt University, Mammana has held positions at the Smithsonian's National Air & Space Museum, the University of Arizona, and San Diego's Reuben H. Fleet Science Center. He now works as an astronomy writer, lecturer and photographer from under the clear dark skies of Southern California's Anza-Borrego Desert. Mammana is the author of six books on astronomy, hundreds of popular magazine and encyclopedia articles and, since 1992, has written "Stargazers," the only nationally syndicated weekly newspaper column on astronomy.

As an accomplished night-sky photographer, his stunning images have appeared in a variety of media and international exhibitions, and can be enjoyed at his website, www.dennismammana.com. He is an invited member of TWAN — The World At Night — an international team of the world's most highly acclaimed sky photographers.

A dynamic public speaker, Mammana has entertained and informed audiences on six continents at resorts, on cruise ships and as an after-dinner speaker, and leads public tours to view and photograph such celestial displays as the aurora borealis and total solar eclipses. He makes frequent appearances on both radio and television.

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Two Planets and the Moon Oct 27, 2026

Week of November 1-7, 2026 If you're an early riser and have been paying attention to the dawn sky recently, you've most likely spotted two prominent "stars" in the southeast; perhaps you've even noticed that they appear to be closing in on one anoth... Read More

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A Celestial Halloween Oct 20, 2026

Week of October 25-31, 2026 It's that time of year when we'll soon be greeted at our front doors by a variety of odd characters. No, I don't mean politicians stumping for your vote; I mean monsters, superheroes and rock singers all begging for a trea... Read More

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The Moon Visits Saturn Oct 13, 2026

Week of October 18-24, 2026 The moon shines brightly in our night sky this week. Stargazers have been known to curse those nights when moonlight blots out fainter, more distant and "interesting" stars, clusters, nebulae and galaxies. Most of us, howe... Read More

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How Far South Can You See? Oct 06, 2026

Week of October 11-17, 2026 I don't know about you, but when I was a kid in school, I learned that folks in the 17th and 18th centuries thought the world was flat and that explorers might sail right off the edge. Spoiler alert: That was (and still is... Read More