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Exploring the universe with radio astronomy

AZPM | By Tony Perkins
Published October 2, 2026 at 8:55 AM MST
Arizona Science 10/2/26 web thumb
University of Arizona Steward Observatory and European Southern Observatory.
(Left) University of Arizona researcher Kate Alexander. (Right) Atacama Large Millimeter Array in Chile.
Exploring the universe with radio astronomy

Radio astronomers search the sky for sources sending out invisible light, including black holes and exploding stars. University of Arizona researcher Kate Alexander investigates locations known to emit radio light, and links her findings with other types of light on the electromagnetic spectrum.

Kate Alexander spoke with Tim Swindle, professor emeritus of Planetary Science at the University of Arizona.

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Tony Perkins
Tony is a veteran journalist whose career in broadcast journalism has spanned more than 30 years and 2 continents. He is host of The Press Room and producer for Arizona Science.
See stories by Tony Perkins