Cloudy with a Chance of Starships

How the Drake Equation Reveals the Odds of Life in the Cosmos

Seven Rasmussen

• Publisher: Princeton University Press
• Year: 2026
• Print ISBN:
  9780691246239
  9780691246222
• eBook ISBN:
  9780691288710
• Topic: Physical Sciences
• Subtopic: Astronomy & Astrophysics

An entertaining tour of the seemingly simple formula guiding the search for extraterrestrial intelligence

Cloudy with a Chance of Starships takes readers on an irreverent expedition through the marvelous world of astrobiology, using as a guide the most important equation in science since E=mc². With an irresistible blend of wit, insight, and the latest cutting-edge research, Seven Rasmussen looks at the thrilling possibilities of life in the cosmos through the lens of the Drake equation, a seven-variable mathematical expression that calculates the number of civilizations in our galaxy that humans could potentially contact.

First proposed in 1961 by astrobiologist and SETI scientist Frank Drake, the equation begins with simple and well-known numbers such as the rate of star formation in the Milky Way and the fraction of stars with planetary systems. It then wades into thornier topics such as the number of planets with environments suitable for life, the fraction of suitable planets on which life appears, and the likelihood of intelligent life emerging on a planet and becoming technological. It concludes with the truly unknowable average lifetime of a civilization. While we will never resolve all its variables, the Drake equation offers an invaluable road map to the questions and challenges that lie before us in our quest for alien life.

Cloudy with a Chance of Starships guides readers from the basics of astronomy to the very frontiers of planetary science, along the way covering subjects such as the Big Bang, the formation of solar systems, the origins and evolution of life, and the fascinating methods used by astrobiologists today. This extraordinary book shares a tantalizing vision of the dawning era of space exploration and invites enthusiasts of all ages to join in the discovery.

Table of contents

• Cover
• Title Page
• Copyright
• Dedication
• Contents
• Introduction
• 1. Stars and Their Planets
• 2. On Habitability
• 3. The Signature of Another Earth
• 4. Intelligence in the Mirror
• 5. The End of Civilization
• 6. Astrobiology’s Frontiers
• 7. Astrobiology’s Tomorrow and Tomorrow’s Astrobiologists
• Bibliography
• Acknowledgments
• Index