Quote:
Originally Posted by Piotrsko
3) Umm: we "know" what the rocks are made from. It is presumed the martian make up is similar and mostly confirmed by the rovers, but does not preclude anything. They could be impact ejecta which may or not be "Star stuff" or actual martian rock.
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* Everything in the solar system came from stars which no longer exist. Stardust.
* Everything on the periodic table, excepting stuff from the linear accelerators is what's in our solar system.
* Everything's been verified by radio telescopes.
* There's nothing on or in Mars which isn't known.
* Orbital mechanics, defines Mars' mass.
* Physics will narrow down the possibilities of Mars' internal mass distribution, centroid, any precession, natural frequencies, harmonics, etc..
* Seismology allows a 'look' inside the planet, it's magmas, the thickness of its crust, mantle, and core(s), core-mantle boundaries, acoustic velocities, densities, density discontinuities, buoyancies, convection, subduction,...
* Geology will determine what minerals can explain the particular physics of the planet.
* Rover soil and rock sample chemical analysis allows more precise analysis.
* Synthetic aperture radar altimeter geodesy examines eccentricity, heterogeneities in the surface which will have limited explanations, leading to additional insights into Mars interior, tidal disruption by it's two moons, etc..
* The weak magnetic field gives us information.( 1/800 of Earth's )
* It's weak gravitational constant. ( 38% of Earth's )
* It's weak sunlight . ( 43% of Earth's )
* Get two-dozen experts together, from two-dozen different scientific disciplines, and they can figure out quite a bit about any planet, without going there.