Final answer:
Jupiter is 20 times heavier than Neptune when you divide Jupiter's mass (2 x 10²⁷ kg) by Neptune's mass (1 x 10²⁶ kg).
Step-by-step explanation:
To find out how many times heavier Jupiter is than Neptune, you simply divide the mass of Jupiter by the mass of Neptune. Given that the mass of Jupiter is about 2 x 10²⁷ kilograms and the mass of Neptune is about 1 x 10²⁶ kilograms, we calculate the ratio as follows:
Jupiter's mass / Neptune's mass = (2 x 10²⁷ kg) / (1 x 10²⁶ kg) = 20.
So Jupiter is 20 times heavier than Neptune.