Look Up in the Sky! It’s a Bird..It’s a Plane..It’s a Once-in-a-Lifetime Green Comet

Over the next two weeks, we will have a chance to see a once-in-a-lifetime scene in the night sky. The Green Comet will pass within 26 million miles of the planet, and will not return again for tens of thousands of years. John Howell speaks with Michelle Nichols, Director of Public Observing at the Adler Planetarium, about this special comet.