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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How Bright Are the Stars? Aug 15, 2019

Week of Aug. 18-24, 2019 Open any book or magazine about astronomy and you're likely to encounter the word "magnitude." Much as with natural phenomena such as earthquakes or tornadoes, the term refers to intensity. In astronomy, "magnitude" measures ... Read More

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Little Big Moon Aug 08, 2019

Week of Aug. 11-17, 2019 One of the most beautiful sights in nature is a massive, full moon rising over the eastern horizon. This is a treat everyone should experience at least once, and when you do, you'll surely ask the same question as every other... Read More

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How Far Are the Stars? Aug 01, 2019

Week of Aug. 4-10, 2019 Guests on my popular Borrego Night Sky Tours quickly become accustomed to hearing large numbers. For example, on any night, I might explain that our Milky Way galaxy is home to hundreds of billions of stars, that our sun prod... Read More