Dr. Michele Bannister talks about interstellar objects, including the recent discovery of 2I Borisov. Astronomers are observing this object with every available telescope to answer key questions, such as: what is Borisov made of? Is it like comets from our own solar system, or is it "really weird and different"? Dr. Bannister fills us in on the latest results. This episode was recorded on November 13th, 2019.

Dr. Jessie Dotson talks about her asteroid risk assessment research. She describes how she and her team create comprehensive models of asteroid impacts. Their research shows that the consequences of an impact depends on asteroid size and where it hits on Earth.