Ask an Astrophysicist

The universe is being pushed apart at a faster and faster rate. And the culprit? Dark energy. Astrophysicist Adam Riess shared the 2011 Nobel Prize in Physics for that discovery, and now’s your chance to ask him about it–or anything else you’ve been wondering about the cosmos.

As background, here’s a look back at some of our recent astrophysics coverage.

Segment Guests

Adam Riess

Adam Riess is a 2011 Nobel Laureate in Physics, a Professor of Astronomy and Physics at the Johns Hopkins University, and a Senior member of the Science Staff at the Space Telescope Science Institute in Baltimore, Maryland.