Dean has been the Astronomer for the Cincinnati Observatory since 2000. He is a renowned educator, author, national popularizer of astronomy and an expert in observational astronomy.
From 2010-2019 Dean was the co-host of the PBS program Star Gazers. He is the author of four books including "Facts From Space!", "100 Things to See in the Night Sky" and 100 Things to See in the Night Sky, Expanded Edition. Dean is a Contributing Editor to Sky and Telescope Magazine and a contributor to Astronomy Magazine, where he won 2008 “Out-of-this-World” Award for astronomy education. Dean has written over 150 astronomy articles for the Cincinnati Enquirer, blogged for the Huffington Post and is regularly featured on television and radio. Dean is a frequent guest on National Public Radio’s Science Friday with Ira Flatow and NPR's Here & Now. He also hosts an astronomy podcast with Anna Hehman called "Looking Up!"
At the Cincinnati Observatory, he has developed his skills as a dynamic writer and public speaker who brings the complicated field of astronomy down to Earth for students of all ages.
Dean's New Book is Here!
100 Things to See in the Night Sky, Expanded Edition
Learn your way around the best, most fascinating objects you can find with the naked eye and binoculars in the updated and expanded collection of planets, stars, constellations, and more. With more detailed star charts this book is perfect for beginners and amateur astronomers wanting to explore the night sky.
Or buy it from the Observatory and arrange a time to pick up a signed copy from our
100 Things to See in the Night Sky
Dean shares his handy field guide for the best stargazing experience whether in your own back yard, camping, or travelling—including information showing you which planets, constellations, stars, and manmade objects you can see with a telescope, or just your naked eye!
Each object is presented as a separate entry, with background information on the makeup, appearance, and history of the object, along with easy-to-follow instructions on how to find it. For astronomy and space fans of all ages, this guide helps you explore the galaxy and see the stars—while keeping your feet on the ground.
Facts From Space!
From Super-Secret Spacecraft to Volcanoes in Outer Space, Extraterrestrial Facts to Blow Your Mind!
Dean's first book will take you from the Earth to the edge of the universe and back.
How did turtles, flies, meal worms, and bacteria become the first living things to go the far side of the Moon? How do you go to the bathroom in zero-gravity? Where should we look for aliens? You will see a Martian sunset, swirl in Jupiter’s Great Red Spot, skim the corona of the Sun, and fall into a black hole.
Upcoming and Recent Appearances
Wall Street Journal review of Dean's Book 100 Things to See in the Night Sky, Expanded Edition
The Tundra - Virtual Event "Beyond Space" Watch it Here
On to Mars (online class) - October 22, 7pm
Here & Now radio program - June 29, 2020 - Listen Here and Now
Washington Post - 100 Things Book - June 20, 2020 - Read the Review
Dean in Cincinnati Magazine - May 15, 2020 - Check out the article
Joshua Tree Night Sky Festival - Keynote speaker - Sept 21, 2019 Joshua Tree National Park
Serpent Mound - Keynote Speaker - September 7, 2019 Talk and Star Party
Shenandoah National Park - Guest Speaker - September 5, 2019
Grand Canyon Star Party - Keynote speaker - June 27, 2019 Grand Canyon National Park
Science Friday - Dean Regas Explains the Lunar Eclipse Listen Here
Here & Now Interview - Super Blood Wolf Moon - January 20, 2019 Here & Now Eclipse
Here & Now Interview - 2018 a Busy Year in Space - Dec 28, 2018 2018 in Review
Books by the Banks - Cincinnati Regional Book Festival - October 20, 2018
Science Friday live from WVXU Cincinnati - April 20, 2018 Science Friday Interview
Hawaii Volcanoes National Park, Hawaii - Star Party - January 29, 2018
Huffington Post - September 11, 2017 Cassini Mission to Saturn Article
New York Times - When the Universe Calls - September 8, 2017 New York Times
Bryce Canyon Star Party - Keynote Speaker - June 23, 2017 Bryce Canyon
NEAF, Northeast Astronomy Forum - Speaker - April 8, 2017 NEAF
USA Today - December 28, 2016 Highlights of 2017
Science Friday with Ira Flatow - December 23, 2016 Science Friday
Science Friday with Ira Flatow - May 6, 2016 Transit of Mercury
Huffington Post - September 24, 2015 Supermoon Lunar Eclipse
Science Friday - September 18, 2015 Keeping an Eye on our Celestial Companion
Science Friday - June 5, 2015 How I Explained the Sun
Dean is currently working on a new kid's book about Pluto.