The Moon Zoo forum has now closed and has been made "Read-Only". You can still browse the threads but cannot post or change anything or register for an account.See Goodbye for our final message.
The moon generated a surprisingly intense magnetic field until at least 3.56 billion years ago, 160 million years longer than previously thought, a new study reports.These findings could shed light not just on the magnetic field of the moon, which is now extremely weak, but on that of asteroids and other distant worlds, investigators added.
A team of Japanese researchers has now analyzed magnetic data from two lunar orbiters, the Lunar Prospector and Kaguya. Both orbited the Moon at low altitudes (under 40km) and tracked the local magnetic fields. After eliminating a variety of areas with complex magnetic anomalies, the team looked at data from 57 different sites on the Moon and used the readings to calculate the orientation of the Moon's magnetic field at various points in its past.