Cosmic rays are also atoms, or more over can be either, electrons, protons, alphas that originate from outside the solar system. Solar wind is not the
same as cosmic rays.
Anyway Id also like to point out that while there are a lot of misconceptions about gravity I come across on this forum many misconceptions about how
charge works too.
Do you know how much cosmic rays would be required to heat an object?
At energies of the order 10^11 we observe 1 particle per second per square meter, But it is logarithmicly increasing to lower energys, so from a
spectrum it peaks at around 10^9 with about 100/second.
Lets for argument sake say that the average energy per particle is 10^10 and we get 500 a second fair? Now lets assume ALL that energy is deposited
and comes out thermal.
1ev = 1.602x10^-19 J
we have 1.602x10^-19 x 10^10 * 500 = 801 nW/m^2
The solar flux is roughly 1.4kW/m^2
I think you can see were I am going with this already... the energy deposited by cosmic rays per meter square is about scale factor of 5.7x10^10...
for all intent and purposes we probably get more extra energy reflected from the moon per meter square than we do cosmic rays.
(that last statement
is a guess)
When you talk on the particle level or lets say objects the size of dust, You cannot say that, a +ve charged bit of dust attracts a cloud of other
stuff. It will attract stuff, but any other -ve charged objects surrounding it, will shield the apparent charge to a great extent. This is how some,
'SOME' atomic physics works, with inner electrons shielding the charge of the nucleus from the outer.
Gravity does not exhibit this effect. It appears on the scales we observe on Earth to only ever be additive. Even on the planetary level it is only
ever additive. Even on the scales of a single galaxy this is true.
What makes us scratch our heads is when we go to extra galactic, and I don't mean local cluster, i mean high redshift clusters, seem to exhibit a
kind of gravitational repulsion beyond what is expected.