Andrea McKenna • July 12, 2026

Strong Turnout for Borrego Night Sky Tour

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Participants experienced Borrego Springs' dark skies through guided telescope viewing and expert commentary.

About 14 people gathered Saturday, July 11, for a Borrego Night Sky Tour led by astronomer Dennis Mammana. Most participants were visiting from out of town, creating an impressive turnout despite the warm and windy summer evening.


Each moment of the tour was carefully coordinated. Mammana used red lights to preserve our night vision, anticipated potential issues before they arose, and gave everyone ample time to look through the telescope. He answered questions throughout the evening, explaining both the basics of astronomy and the science behind each celestial object.


We viewed four telescope targets, beginning with Albireo, a striking blue-and-gold double star located hundreds of light-years from Earth.


Next was the Swan Nebula, a vast cloud of gas and dust about 5,500 light-years away where new stars are actively forming.


Our third stop was the Great Globular Cluster in Hercules, an immense cluster containing roughly 300,000 stars and estimated to be more than 11 billion years old.


The final telescope view featured two distant galaxies—Bode’s Galaxy and the Cigar Galaxy—located about 12.3 million light-years from Earth. There was some concern that light pollution from the Coachella Valley might interfere, but both galaxies were still visible through the telescope.


Beyond the telescope, Mammana guided us through the night sky, identifying Venus, the Big Dipper, Polaris (the North Star), the Summer Triangle, Antares, Scorpius, Cassiopeia and the glowing star clouds of the Milky Way.


We also saw several "shooting stars," and Mammana joked that they change their names three times: meteoroids in space, meteors when they enter Earth's atmosphere, and meteorites if they survive the journey and reach the ground.



Another highlight was watching China's Tiangong Space Station pass overhead twice as it traveled from west to east. Mammana explained that it remained visible because it was still reflecting sunlight high above Earth, even though it was already dark where we stood. He also noted that the International Space Station was too low on the horizon to be visible that evening.


The experience showcased why Borrego Springs is recognized as one of the premier places in Southern California for stargazing. Mammana's combination of organization, humor and deep knowledge made the evening enjoyable for both first-time observers and longtime astronomy enthusiasts.


Keep Up With Dennis Mammana





Reserve Your Spot for the Lunar Eclipse Spectacular

Mammana's next special event is the Lunar Eclipse Spectacular on Thursday, Aug. 27, from 7:30 to 10:30 p.m. Those interested in attending can email dennis@borregonightskytours.com with the number of people in their party to inquire about availability.



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