Question

How would you calculate Pluto's aphelion distance?

Answer 1

a(1+e) is the formula to calculate Pluto's aphelion distance

Answer 2

Astronomers use another term to measure distance in the Solar System called “astronomical units”. 1 astronomical unit, or AU, is the average distance from the Earth to the Sun – about 150 million km. Pluto's perihelion is 29.7 AU, and its aphelion is 49.3 AU. Pluto's average distance, or semi-major axis, is 39.5 AU.