Looking at Earth and Sun, this is what we know from satellite and space observatory data:Wiki has this to say:
The Earth's original rotation was a vestige of the original angular momentum of the cloud of dust, rocks, and gas that coalesced to form the Solar System. This primordial cloud was composed of hydrogen and helium produced in the Big Bang, as well as heavier elements ejected by supernovas. As this interstellar dust is heterogeneous, any asymmetry during gravitational accretion resulted in the angular momentum of the eventual planet.
1) The solar photospheric magnetic field rotates with a period of approximately 26.5 days depending upon solar activity. The greater solar magnetosphere, along with the associated “neutral current sheet” also rotates to some degree with the spin of the sun (unlike as the case with a perfectly straight bar magnet).
The ‘solar wind’ is plasma enriched and has angular momentum.
The torque exerted by the rotation of Sun’s equatorial plasma-current sheet is far less influential at Earth’s orbital distance than radial radiation; however that rotational torque of the current sheet (with its associated Alfven waves) is continuous,
although variable over time in amplitude and phase.
2) Earth’s long magnetotail and plasma-current sheet stretch out to the earth-night side and is always positioned nearly broadside to the solar plasma sweep.
It is electrically coupled to Earth’s magnetosphere and ionosphere, as well as to Earth’s poles (hence polar aurora).
The colloquial term “windsock” is often applied here, but in effect, Earth’s plasma tail acts as a plasma 'sail’ or screen in the co-rotating solar plasma flows.
It would be only logical to conclude that by the common physics of motion and Faraday's Laws, momentum is being transferred electro-magnetically from sun to planets, in addition to gravitational influences.
Note: Any return flows from inner heliosheath layers (as a very large resonant cavity?) will increase as a square of distance, as does gravity. Further support of the Sun-Earth electrical connection is evidenced by the well-recorded variations in time-of-day, and of terrestrial magnetic declinations (which in turn have diurnal correlations with barometric pressures world-wide).
https://earth-planets-space.springerope ... 017-0707-2
https://www.nasa.gov/mission_pages/sune ... phere.html
http://iopscience.iop.org/article/10.38 ... /2/144/pdf