Every star we see in the sky has at least one planet orbiting it, says astronomer Sara Seager. So what do we know about these exoplanets, and how can we find out more? Seager introduces her favorite set of exoplanets and shows new technology that can help collect information about them -- and even help us look for exoplanets with life.

Today we have the tools to not only discover exoplanets but to study their atmospheres. The near-term goal is to search for signs of life in an exoplanet atmosphere. Ultimately, we will need a detailed look at any exoplanet that shows some evidence of hosting life, involving bold concepts in space science. Dr. Sara Seager portrays exoplanets and...