[staytrue]

For me the enigma of Uranus is that it rotates at 90 degrees unlike the earth at 23 degrees and most other planets.

If you believe in the acreation mode of planet formation and conservation of angular momentum, the 90 degree tilt makes no sense.

[Junior]

Unless it was hit by something REALLY BIG at one time...

[RightWhale]

Seems there was a momentum transfer early in the formation of the solar system from an outside object that is long gone. The explanation of how planetary mag fields are created, and even the sun's mag field, has not been satisfactory. An iron core could generate a mag field, but an atmosphere could also. The fact that earth's planetary mag field can reverse and change strength might indicate a less stable source than the massive iron core.