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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A Unique Return of Saturn Sep 16, 2025

Week of September 21-27, 2025 We've been many months without a bright planet in the night sky, but that's all about to change! On the night of Sunday, Sept. 21, the ringed planet Saturn officially returns to the evening sky, and all planet watchers w... Read More

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A Celestial Trio to Greet the Dawn Sep 09, 2025

Week of September 14-20, 2025 Early risers have probably been marveling at the dazzling white "star" now appearing in the eastern sky at dawn. It is, of course, the brilliant planet Venus. But this week it will team up with a couple of other celestia... Read More

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Farewell to the Stars of Spring Sep 02, 2025

Week of September 7-13, 2025 As the greens of summer gradually give way to the reds and browns of autumn, the night sky is undergoing its own seasonal changes. In the eastern sky at dusk, the autumn stars prepare to take center stage, while the sprin... Read More

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Watching Nighttime Rise Aug 26, 2025

Week of August 31 - September 6, 2025 If you've stood outdoors on any clear night, you've likely seen a "star" drifting lazily across the sky. If you're like many stargazers, you watched it for a few minutes ... and were surprised to see it gradually... Read More