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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A Lunar Eclipse Sneak Preview May 13, 2021

Week of May 16-22, 2021 Early on the evening of Tuesday, May 25, watch as the sun sets behind the western horizon; then, face the opposite direction and you'll soon spot the moon rising in the east. On that night, the moon's phase will be full, and ... Read More

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Why Is the Night Sky Dark? May 06, 2021

Week of May 9-15, 2021 If you're out looking for the moon this week, you'll have a tough time finding it. On Tuesday, it lies nearly in the direction of the sun (its "new moon" phase), but by Thursday, it will appear as a thin crescent low in the wes... Read More

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Seeing Halley's Meteors Apr 29, 2021

Week of May 2-8, 2021 Halley's Comet hasn't appeared in our sky for a quarter-century, but during the pre-dawn hours of Thursday, May 6, stargazers will have a chance to see pieces of this famous celestial visitor. On that morning, sky watchers far ... Read More

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Why Doesn't the Moon Rotate? Apr 22, 2021

Week of April 25 - May 1, 2021 Here we are, already at the end of April, and with this season comes some beautiful evening weather to help us enjoy our night sky viewing. This week, the full moon illuminates our sky on Monday, April 26, and as the fu... Read More