Poul Anderson, "Territory" IN Anderson, David Falkayn: Star Trader (Riverdale, NY, 2010), pp. 1-76.
(The contents page classifies "Territory" as a "novella": longer than a short story but shorter than a novel.)
There are many terrestroid planets in sf but Anderson also shows us some that are different, e.g.: t'Kela:
temperature 60 below;
enough nitrogen to induce narcosis;
enough ammonia to burn lungs;
no water vapor;
enough oxygen to sustain life for several minutes.
Human
beings have several kinds of business on t'Kela but must be
permanenetly protected from its environment. Would you want to spend any
time there? And why is van Rijn without a helmet in that cover
illustration?