[/caption] The mass of Neptune is 1.02×1026 kg. That’s a pretty big number. If you wrote it out, it would be 102,000,000,000,000,000,000,000,000 kg. That’s still hard to wrap your brain around, so let’s give you some context. The mass of the Earth is 6 x 1024 kg. In other words, the mass of Neptune is … Continue reading "Mass of Neptune"