Skytalk is hosted by WHYY's Dave Heller. Each week he discusses the latest news in astronomy with Dr. Derrick H. Pitts of the Franklin Institute.

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An especially carnivorous supermassive black hole sitting at the center of a galaxy is gobbling galactic gases at an astonishing rate ...

Air Date: May 21, 2018

Listen 06:00

The Color Purple

Newly discovered? A purple planet! Actually, the color suggestion is just speculation based on the planet’s expected chemical compo ...

Air Date: April 30, 2018

Listen 06:11


Move over Stonehenge – Philadelphia will feature its own version on Friday, April 6 at 7:30 p.m., when the sunset will align with M ...

Air Date: April 2, 2018

Listen 05:39

How Big is Big?

An acceptable range for the estimated number of galaxies in the universe is between 100 and 200 billion, according to astronomer Mario Li ...

Air Date: March 26, 2018

Listen 07:19

Spring Ahead

Remember to advance your timepieces one hour before retiring Saturday night; Daylight Savings Time starts Sunday morning at 2:00 am. ...

Air Date: March 6, 2018

Listen 6:22
This image was taken with Opportunity's navigation camera of a large dune on the way to Victoria

Rover Still Rovin’

NASA’s Mars Reconnaissance Orbiter has returned images that clearly show thick layers of water ice just beneath the surface and ext ...

Air Date: February 26, 2018

Listen 05:08
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