WHEN I TALK TO SCHOOL KIDS around the country, I tell them how lucky they are to be studying science now, at this moment in the history of space exploration. When I started out in science, we had only nine planets to study, and that number soon shrank to eight when we demoted poor Pluto. By the time my young audiences are in graduate school, they will have literally hundreds of planets to investigate.
One reason for this coming wealth of other worlds is the NASA mission TESS, the Transiting Exoplanet Survey Satellite. During its two-year primary mission, TESS is expected to find 1,500 planets orbiting nearby stars, and among those, to identify 50 rocky, Earth-like or potentially habitable planets (see p. 34). Imagine: Three decades ago, we didn’t know…
