Location from Project Hail Mary by Andy Weir
Rocky's star — dimming under the same Astrophage infection that threatens Sol, proving that the crisis is not humanity's alone.
40 Eridani connects the human and Eridian stories: both species face the same existential threat from the same organism attacking their respective suns. The Astrophage don't care about species, civilization, or technology — they eat starlight indiscriminately. The local Astrophage population breeds on Threeworld (40 Eridani's equivalent of Venus/Adrian) and returns to feed on the star. Without intervention, 40 Eridani dims to the point where Erid becomes uninhabitable. Rocky's mission to Tau Ceti mirrors Grace's exactly: find out why one star is healthy when yours is dying, and bring the answer home before it's too late.
A star in the 40 Eridani system, visible from Earth as an unremarkable point of light. It burns at reduced luminance as Astrophage consume its output, slowly starving the planets that depend on its energy — including Erid.
Also known as: 40 Eridani, Rocky's Star