Radio’s Guide to the Universe

StarDate host Billy Henry

StarDate debuted in 1978, making it the longest-running national radio science feature in the country. It airs on more than 300 radio stations. It has been hosted by Billy Henry since July 2019.

StarDate tells listeners what to look for in the night sky, and explains the science, history, and skylore behind these objects. It also keeps listeners up to date on the latest research findings and space missions. And it offers tidbits on astronomy in the arts and popular culture, providing ways for people with diverse interests to keep up with the universe.

StarDate is a production of The University of Texas McDonald Observatory, which also produces the bi-monthly StarDate magazine.

The Voice of StarDate

Billy Henry, a voice talent, musician, composer, and college lecturer in Austin is the third narrator of the StarDate radio program. Read more »

The Music of StarDate

The StarDate background music was written by Bill Harwell and Patterson Barrett specifically for StarDate.

More Than 40 Years and Counting!

StarDate is radio’s longest-running nationally aired science program. It began in 1977 as a daily telephone message service by McDonald Observatory. It was picked up by Austin radio station KLBJ-FM, and aired as “Have You Seen the Stars Tonight?” beginning in June 1977. With a grant from the National Science Foundation, the program became “Star Date,” and began airing nationally, seven days per week, on October 1, 1978. It quickly reached more than 1,000 stations across the country. Read more »

Today’s Episode

Edward Maunder

Most years, the Sun produces hundreds or thousands of sunspots – magnetic storms that look like dark splotches on its surface. From 1645 to 1715, though, sunspots all but disappeared. In many years, the number stayed in the single digits. And in some years, there were no sunspots at all. Today, that period is known as the Maunder minimum. It’s named for British astronomer Edward Maunder, who was born 175 years ago today. He wrote about the period in the late 1800s. Maunder was working at Britain’s Royal Observatory. He was assisted by his wife, Annie, who was a “computer” at the observatory – someone who did the tedious calculations. Maunder discovered a pattern in the sunspots, which wax and wane during a cycle of about 11 years. When a new cycle begins, most of the sunspots are concentrated at the Sun’s middle latitudes. As the cycle peaks, they’re concentrated closer to the equator. But he’s best known for the Maunder minimum. It occurred during the “Little Ice Age” – a period of unusual cold. That suggests a link between solar activity and Earth’s climate. But the link isn’t confirmed – it could be just a coincidence. We still don’t know what caused the sunspots to vanish. It had happened at least once before. So the mystery of the Maunder minimum remains unsolved. Script by Damond Benningfield
Go to episode

Upcoming Topics

  • April 13-19: Morning Meet-Up

    Three planets stage a tough-to-see meet-up in the dawn sky this week, and we’ll have details. We’ll also explain why such alignments are nothing to worry about. Please join us for this morning alignment and more.

  • April 6-12: Just Riding Along

    We’ll go for a wild ride through the universe, we’ll ride along with a comet, and we’ll preview a mission that’s ready to ride far from Earth. Please join us for these cosmic ride-alongs, plus an exploding star and more.

  • March 30-April 5: Reclusive Planet

    The planet Mercury is hard to study from here on Earth, and we’ll explain why. We’ll also talk about possible efforts by a “non-terrestrial” intelligence to make contact, and much more.

Shopping Cart

Start typing and press enter to search

Scroll to Top