Yes, Mars has gravity. That is why it orbit's the Sun. Had it no gravity, it wouldn't be there.
( No IRON CORE )and that solar winds blow everything off.
They don't know if Mars has an Iron core, but it probably does. What it doesn't have is a sufficiently strong magnetic field. As a result, they believe that the Solar wind does take off big chunks of it's atmosphere.
“They don’t know if Mars has an Iron core, but it probably does. What it doesn’t have is a sufficiently strong magnetic field.”
Mars is basically a dead planet because its core has completely solidified, which is why it has no magnetic field, not to mention there’s no interior heat radiating out to help warm its crust. The slow motoring action of the solid Earth iron core surrounded by the molten mantle is what gives the Earth its powerful magnetic field.
Centrifugal force is one aspect of gravity what the thing itself is no one agrees, except that the more mass a body has, the stronger the gravitational pull - Jupiter’s gravity is many time Earth’s.
Orbiting the sun has nothing to do with the strength of a body’s gravity. Mass seems to be the determinate factor.
Mars has weak gravity, and gasses escape it more rapidly than gasses in Earth’s atmosphere, however, Mars does have an atmosphere.
The recent mars/water hype from NASA centers not on the water which the media decided to focus on, but around the presumption that Mars suffered a catastrophic event which blew the atmosphere off. Some obvious evidence for some sort of catastrophe is a comparison of one hemisphere with the other - both are very different - one has many craters, the other only a few. in fact the hemisphere with many craters looks like it was hit by cosmic shotgun pellets. There are also a number of non-mainstream theories on how this might have occurred.
The reason the media neglect to mention the actual message NASA revealed is just that the very idea contradicts the steady state historical model the media favors - also admitting that major historical catastrophes actually happened could cause the same panic in people’s minds that the very thought of Republicans winning the Presidency, House and Senate produces in the media’s collective minds.
what it does not have is enough mass to hold an atmosphere.
early in its’ formation it had atmosphere, flowing water, oceans even, and underground water.
But, over time, gases were able to slowly escape away into space, leaving the planet cold.
the underground water is still there, though some weeps to the surface (arteasan well, if you like)in Martian “summer”.
whether it has an iron core, or not, is a side issue.