Under what conditions will the stars appear in their true positions?

In our physics class, we're studying refraction. One of the questions for our lab work goes like this:





Atmospheric refraction distorts the position of stars.Under what conditions will the stars appear in their true positions?Under what conditions will the stars appear in their true positions?
When you are outside of the upper layers of atmosphere. In a spatial vessel, you have very few particles and so no distorsion by refraction