ACKNOWLEDGMENTS

Thanks to my “brain trust” of astronomer friends and colleagues: Natalie Batalha, Jack Brandt, Tania Burchell, Lynn Cominsky, Dennis Crabtree, Jack Dunn, Davin Flateau, David Grinspoon, Madulika Guthakurtha, Nicole Gugliucci, Christine Pulliam, Catherine Qualtrough, Seth Shostak, Mike Snow, Padma Yanamandra-Fisher, and to the editors at Adams Media. Everyone made very cogent and helpful suggestions along the way. Special thanks go, as always, to Mark C. Petersen for reading the entire manuscript, making excellent comments, and providing love and support during the creative process.