I read this 25-30 years ago and thoroughly enjoyed it, like all of Robert Forwards books. Full of science and some great speculation and big imagination.
In a moving story of sacrifice and triumph, human scientists establish a relationship with intelligent lifeforms—the cheela—living on Dragon’s Egg, a neutron star where one Earth hour is equivalent to hundreds of their years. The cheela culturally evolve from savagery to the discovery of science, and for a brief time, men are their diligent teachers.
“In science fiction there is only a handful of books that stretch the mind—and this is one of them.”—Arthur C. Clarke