While its premise of alternate history and extinction event meteorite strike is science fiction, the story of astronauts is decidedly based in fact. The author acknowledges a debt of experts who proofed the details, but she told the story and plot in her own way. It is a great collaborative work I gave up fact checking and anachronism checking because it was all accurate. The protagonist was a delight to read, and all the ancillary characters were well written and integral to the part. At around 400 pages, it was a fast read, and has me thinking about the whiteness of the NASA program, and how I never questioned it myself. That. Is what sets this novel apart- a fun read with history that cause you to think.