Carl Sagan didn’t write an autobiography per-se, but he references his own life and experiences repeatedly in several of his books includingThe Demon Haunted World and Billions & Billions(which he wrote after being diagnosed with the illness that would ultimately kill him, which he discusses in the book). Both books would be on my “deserted island/spare copies to loan out” lists.
Gore Vidal has written two autobiographies- Palimpsest and Point-to-Point Navigation. He’s not science-minded so much but he’s atheist and liberal in droves and a good- if often very bitchy- writer. He’s also written many autobiographical essays, some of which are on line. If you’re not that familiar with him he’s known everybody:
-Grandson of a blind U.S. Senator in the 1920s-1930s so he witnessed the politics of that era first hand as his grandfather’s seeing eye boy
-Son of Gene Vidal, a leader in the field of aeronautics (and who had an affair with Amelia Earhart and is portrayed in the recent biopic)- Vidal flew a plane solo when he was 9 (though I don’t think he was a pilot as an adult)
-Son of Nina Gore Vidal Auschinschloss, a woman who married into an extremely wealthy D.C. family (giving Vidal an insider/outsider view of very rich and powerful society)
-Related by marriage (kinda sorta) to Jackie Bouvier (when Vidal’s mother divorced her second husband he married Jackie’s mom, making Jackie and Lee stepsiblings to Vidal’s half siblings) thus knew her before she married JFK
-Good friend of JFK (though an enemy of RFK)
-Wunderkind author in the 1940s and 1950s who wrote some of the first mainstream “gay” novels (though he cannot stand being labeled as gay)
-Hollywood screenwriter who claims to have written the screenplay for BEN HUR (though Charlton Heston denied it) and to have peppered it with homoeroticism
-Close friends with Paul Newman/Joanne Woodward, Tennessee Williams, and a zillion other literary and movie figures; archenemies with Truman Capote, Anais Nin, Charlton Heston and other literary and movie figures
Anyway, often over-the-top, but always worth reading.