Variation in relative densities in the solar system, due to the Lorentz force (β = 1, Q/m = 0.5 C/kg). Observing times are from left to right and top to bottom: 1996, 1998, 2000, 2002, 2004, 2006. The solar minimum of the defocusing cycle is in mid-1996. The maximum effect of this on the density is about 3 years later. Solar maximum is in 2002, and the solar minimum of the focusing cycle is in mid-2007.