This book would not have existed were it not for the exceptional levels of support and belief of those at Penguin Random House and the UK Space Agency; Ben Brusey, Lizzy Gaisford, Katie Loughnane, Matt Goodman, Sue Horne and Diana Martin.
Berti Brigitte Meisinger, Nicole Buckley, Anita Sengupta and Kelly Latimer very graciously and generously shared their time with me; thank you very much, it was an honor to hear you share your stories.
I am indebted to all the brilliant people who offered information and suggestions in my research, particularly George Morgan, Glen Cornhill, Dallas Campbell, Kevin Fong, Gale Allen and Elizabeth Scully. Your suggestions and help have all played their part in shining the spotlight on these amazing women.
My friends and family have been magnificent, always offering encouragement and understanding through the project, even when I seemed to have vanished into hibernation.
And to Chris, for everything.