“I heard today the Mars has no gravity ( No IRON CORE )and that solar winds blow everything off.”
No, every piece of matter in the universe has gravity. What Mars lacks is a magnetic field, that is what shields planets from the solar wind.
It does have some small, localized magnetic fields that could protect small regions of the planet, but it doesn’t have a “bubble” of magnetism that shields the whole planet.
ok thanks. No water