To Be Taught, if Fortunate is a standalone hard-SF novella from Becky Chambers.
Flight engineer Ariadne O’Neill and mission specialists Elena Quesada-Cruz,
Jack Vo, and Chikondi Daka have been dispatched aboard the OCA spacecraft Merian to the red dwarf star Zhenyi (BA-921), just which is a mere fourteen light-years from Sol.
Faster than light drives do not exist and neither does terraforming. Instead, the explorers must depend on somaforming, a technologically induced metamorphosis that will adapt them to the worlds they visit.