WARNING!

This website contains spoilers for Andy Weir’s Project Hail Mary.
It is recommended you read the book before exploring this site.

Science Facts

Beanbags that explore interesting scientific topics in Project Hail Mary.

I start with what makes me happy. I like science. 02.116

#2

The Petrova line isn't real, but there are real astronomical instruments that can detect infrared light at 25.984 microns.

#8

Venus lacks an intrinsic magnetic field, and that’s weird.

#13

Acceleration due to gravity on Earth varies depending upon location, but you can’t fault Ryland’s teacher brain for sticking with two significant figures.

#19

Amaterasu is not a real solar probe, but it is the name of an ultra-high-energy cosmic ray.

#25

Humans have sent space missions to Venus since the 1960s, though many early attempts ended in failure.

#32

The habitable zone, or Goldilocks zone, can vary in size and position for different types of stars.

#40

Argon is useful for science but a poor choice for breathing.

#46

Stratt's desire to protect Earth from extraterrestrial contamination partially reflects our own modern planetary protection efforts.

#52

Cesium-137 is a radioactive isotope which produces gamma rays hazardous to many species yet apparently ineffective when studying the nature of Astrophage.

#58

Spectroscopy is a valuable tool in understanding both Astrophage and the wider cosmos.