- #1
jarroe
- 40
- 0
How big does a planet have to be in order for it to have a molten core or a magnetic field? Assuming no other large objects were close enough to affect the planet with their own pull or magnetic field. I would imagine the composition/density of the planet would play a factor as well, but do we have any formulas out there that would descibe this. Perhaps we don't have enough samples/data to make an informed decision on this yet?