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Speed of Light

The maximum velocity for everything in the universe; 186,282.397 miles (299,792.458 km) per second, or fast enough to go to the Moon and back in less than three seconds.

Radio Programs

Moon, Jupiter, Aldebaran The short life of a photon August 8, 2023

Close Neighbor A bright galaxy that’s far, far away October 22, 2022

Moon and Jupiter A slight delay in the night sky September 10, 2022

Roswell Incident II The reality of star trekking July 7, 2022

Ether Filling the empty universe September 6, 2021

Moon and Companions A star that might not be there October 2, 2019

Foucault and Fizeau Two “enlightened” French scientists September 18, 2019

Moon and Regulus How time can stand still January 22, 2019

Moon and Aldebaran The bull’s eye shines into space September 29, 2018