The universe

“Back-to-basics” month continues on SkyTalk as Derrick Pitts and WHYY’s Dave Heller examine how we see the uni ...

Air Date: January 26, 2009


How the sky appears to us

WHYY-FM’s Dave Heller and astronomer Derrick Pitts celebrate Skytalk’s 18th season on the air by doing what they do best̷ ...

Air Date: January 12, 2009