What is the most significant thing Homer Hickam does in October Sky?

I would say that the Homer's pursuit of his dreams is
probably the most significant element in his narrative.  The fact that he never
sacrifices his dream despite his father's inertia and the state of being in Coalwood are
challenging enough elements. Yet, Homer does not acquiesce to these elements.  The most
significant thing Homer does is to pursue and continue the vision that exists in his
mind, and in the subjective experiences of the Rocket Boys.  The idea that the boys are
able to pursue their dreams in a setting that is not immediately appreciative of their
elements is vitally important.  It becomes incredibly important for Homer to act and to
continue to act on the advice of his mother in pursuing the designs and execution of his
foray into the realm of rocket technology.  This becomes his calling and his chosen
profession so it would be logical enough to presume that his mere continuation of this
through adverse conditions becomes the most significant element in his
narrative.