The planet neptune is the farthest planet from the sun. a satellite is orbiting around neptune at a distance of 180 km. as the satellite orbits, only a portion of the planet may be seen at one time. this is referred to as the horizon circle and denoted by the variable h. the distance between the satellite and the horizon circle h is 2,992 km. find the approximate diameter of the planet neptune. round your final answer to the nearest kilometer. a. 9,846 km b. 24,777 km c. 49,554 km d. 49,732 km