Comment: Water ice is a highly unlikely answer to the puzzle. Once again, there is an electrical possibility. Mercury is likely to have a weak dipolar magnetic field. Mercury, like all planets is connected to the solar circuit. That connection follows the magnetic field down to the poles. Any remanent magnetism of the electrical craters at the pole will tend to focus the plasma discharges upon those craters. In the near vacuum at Mercury’s surface, electrons will strike the surface and form more dense plasma. If sufficiently dense, the plasma layer acts like a metallic surface coating and returns a strong radar echo. I have addressed this issue in the “The Shiny Mountains Of Venus.” If this view is correct the strong radar returns may change abruptly or flicker as the auroral-type discharge moves about.
Astronomical Myths of Mercury & the Sun | holoscience.com | The Electric Universe
Astronomical Myths of Mercury & the Sun | holoscience.com | The Electric Universe