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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Winter's Coming! Dec 09, 2025

Week of December 14-20, 2025 We've all noticed it. Nights are growing longer, furnaces are working harder, and in many places, snow is blanketing the land. No doubt about it: Winter is coming! The exact moment that winter arrives in our planet's Nort... Read More

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Catch Some Falling Stars! Dec 02, 2025

Week of December 7-13, 2025 Next weekend will be a great time to get away from city lights to enjoy the night sky and the annual Geminid meteor shower. Meteors are also known as falling, or shooting, stars because they appear to be stars that, well, ... Read More

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Celestial Guests Join the Winter Hexagon Nov 25, 2025

Week of November 30 - December 6, 2025 The brilliant moon illuminates our night sky again this week, reaching its full phase on Thursday, Dec. 4. All that extra light in the sky means that stargazers will see only the brightest of celestial objects o... Read More

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A Colorful Celestial Showpiece Nov 18, 2025

Week of November 23-29, 2025 Many stargazers are surprised to learn that stars do not all appear the same but actually display different colors. Those that appear white are hotter than those that are orange or red. And bluish stars are the hottest of... Read More