Mercury was discovered to have a surprisingly Earth-like (though much weaker) magnetic field (see geomagnetic field).
The dominant primary component of the flow, the longitudinal field, and the much weaker transversal field arise at the first and the second orders of the analysis, respectively.
Superimposed on the toroidal field is a much weaker poloidal field generated by an electric current flowing in the plasma around the tours, so the plasma forms the secondary circuit of a transformer.
After spending time on Mars' much weaker gravitational field, it would be almost impossible to readjust back to Earth's much stronger gravity, says Landsorp.
Behind this peak lower frequency components of the sound are strongly influenced by the effective pressure-release condition on the free surface of the water, and the radiation acquires the characteristics of a much weaker dipole field (with dipole axis normal to the water interface) accompanied by a rapid decrease in wave amplitude.
Biological objects, flying on planned long-term interplanetary missions, would experience much weaker magnetic fields, since galactic MF is known to be 0.1 1 nT.
In this view, for the case of non-ferromagnetic impellers, while the velocity fluctuations that could result in the α effect are still present, the toroidal field present is much weaker, and thus the poloidal field generated by the α effect near the impeller vanes is no longer sufficient for dynamo action.
Backward steps are shown to be much weaker producers of far-field sound than similarly sized forward steps.
One of the new studies could help clear up some of the many enigmas about magnetars, such as why they form and why they don't behave like their more abundant cousins, called neutron stars, whose magnetic fields are much weaker.
