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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Summer Has Returned. ... But Why? Jun 23, 2026

Week of June 28 - July 4, 2026 It was bound to happen: The heat of summer has arrived at my desert home. As I write these words, it's 115 F outside, and it's just the beginning of the blistering heat we'll experience for months. This is no surprise, ... Read More

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Still Awaiting the Blaze Star Jun 16, 2026

Week of June 21-27, 2026 OK, let's try this one more time. Back in 2024, I wrote (twice) about a "new" star that was expected to burst forth in our night sky. The star, you may recall, is called T Corona Borealis — aka the "Blaze Star" — ... Read More

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Finding La Superba in the Night Sky Jun 09, 2026

Week of June 14-20, 2026 The universe is a colorful place, but stargazers are often frustrated when they cannot see the glorious colors that appear in celestial photographs. These are all quite real, so why are we unable to see them? One reason is th... Read More

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Approaching the Solar Apex Jun 02, 2026

Week of June 7-13, 2026 During one of my recent night sky tours, an elderly guest gazed into the sky and asked if the stars ever move. He said the constellations look the same now as when he was a child, and he was convinced that nothing in the heave... Read More