A weak magnetic field likely attracted matter inward, contributing to the formation of the outer planetary bodies, from ...

At most, such a field would have been about 15 microtesla. (The Earth's own magnetic field today is around 50 microtesla.) ...

The researchers found that rocks dating from 3.7 billion years ago captured a magnetic field strength of at least 15 microtesla comparable to the modern magnetic field (30 microtesla). These ...