The James Webb Telescope Will Let Astronomers Peer Into Exoplanet Skies
One in two sun-like stars in our galaxy has a sub-Neptune exoplanet, a world between the size of Earth and Neptune, says Jacob Bean, an exoplanet astronomer at the University of Chicago and co-leader of two planned exoplanet observations outlined in a recent NASA announcement. Astronomers still know little about the formation and composition of these plentiful worlds. Are they rocky Earth-like planets that grew a little larger and acquired a thick atmosphere?...