Final answer:
Neptune is approximately 1.67 times bigger than Earth in terms of mass.
Step-by-step explanation:
To find out how many times bigger Neptune is than Earth, we can compare their masses. The mass of Neptune is 1 x 1026 kg and the mass of Earth is 6 x 1024 kg. To find the ratio, we divide the mass of Neptune by the mass of Earth: 1 x 1026 kg / 6 x 1024 kg = 1.67. This means that Neptune is approximately 1.67 times bigger than Earth in terms of mass.