Linked from
The 63 pages that link to Orbital mechanics, each with the reason it gives.
Scott CarpenterRelated: Carpenter had to orient and maneuver Aurora 7 while maintaining its orbit.
Alfred WordenNarrower topic: It governed the trajectories Worden monitored around the Moon.
Epsilon Canis MajorisRelated: It explains how the two stars in Adhara remain bound.
Project Hail MaryRelated: The interstellar mission depends on navigation under physical constraints.