Original: The most common are perigee and apogee , referring to orbits around the Earth ( Greek , gÃ , '' earth '' ) , and perihelion and aphelion , referring to orbits around the Sun ( Greek , hÄ '' lios , '' sun '' ) .
Simplified: The most common are perigee and apogee , referring to orbits around the Earth , and perihelion and aphelion , referring to orbits around the Sun ( Greek â Î Î '' Î Î Ï hÄ '' lios sun ) .