Following Glen Van Brummelen (Reference 1 below, p. 129, stereographic projection), spherical trigonometry, though certainly no longer relevant to the older scientific needs of navigation, astronomy, geography, etc., other than as historical mathematics, has nevertheless seen a "rebirth" today due to simulation, game programming, Autodesk Maya, kinematics, physics engines, and many other new fields as diverse as optics, photography, art and medicine.
Sphere | sphere | Poincaré sphere | Riemann sphere | Bloch sphere | The Sphere (newspaper) | The Sphere | Star Ocean: Blue Sphere | Sphere packing | sphere packing | Sphere Origins' | McClintic Sphere | Lenart v Slovenskih Goricah | Inner sphere electron transfer | Hand with Reflecting Sphere | Greater East Asia Co-Prosperity Sphere | François Morellet, ''Sphere - Matter'' 1962, Skupturengarten Abteiberg Museum in Mönchengladbach | Ewald's sphere | Advanced Inertial Reference Sphere |