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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The Great Summer Triangle Jul 14, 2026

Week of July 19-25, 2026 We can spend our time under the stars trying to find constellation figures from mythological times, but we'll always have limited success. If we really want to see pictures among the stars, I'm afraid we need to create our ow... Read More

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Finding the Celestial Teapot Jul 07, 2026

Week of July 12-18, 2026 I don't know about you, but the last thing I want on a warm summer night is a cup of hot tea, yet that's exactly what appears to be brewing in the southern sky just after dark this week. During July evenings, we can find a co... Read More

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Finding the Celestial Serpent-Bearer Jun 30, 2026

Week of July 5-11, 2026 There's a constellation in our night sky right now that is somewhat unknown to stargazers. Despite being huge — it's the 11th-largest in all the heavens — it has no stars brighter than the North Star, so you won't ... Read More

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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