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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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

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The Dipper and the Queen Aug 19, 2025

Week of August 24-30, 2025 Two easy-to-find star groupings appear during late summer and early autumn. You can see them by going outdoors and facing north during early evening hours. Look low in the northwest for the seven equally bright stars of the... Read More

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Why Is the Night Sky Dark? Aug 12, 2025

Week of August 17-23, 2025 Have you ever wondered why the night sky is dark? Doesn't seem like much of a brainteaser, does it? Everyone knows the sky darkens at night because the sun sets ... or more accurately, because our part of planet Earth rot... Read More