Neil de Grasse Tyson on Measuring Dark Energy

Can we use a spectrometer to measure Dark Energy Neil deGrasse Tyson, astrophysicist, host of StarTalk Radio and director of the Hayden Planetarium, answers a fan s Cosmic Query in this Behind the Scenes video. With cohost Chuck Nice. If you love StarTalk Radio, don t miss out on any StarTalk news. Sign up for our free newsletter: Catch up with StarTalk Radio around the web: iTunes SoundCloud Stitcher Twitter Facebook Google+ Pinterest