i have seen some EU things in my time but that is either one of the most amazing, or, even more proof and evidence for water on Mars ...

any more on where and what?
Aardwolf wrote:Phobos & Deimos orbits identify the strength of gravity on Mars.
Their densities calculate so low, that it is speculated that they are porous, or hollow.Aardwolf wrote:Phobos & Deimos orbits identify the strength of gravity on Mars.
The moon is so small that a 150-pound person standing on its surface would weigh only two ounces.
Mass: 1.0659 x 10^16 kg
Density: 1.872 g/cm^3
Despite remote sensing investigation by Mars Express, Mars Reconnaissance Observer and Mars Global Surveyor, the composition of Deimos has not been resolved. The composition is a key indicator in the search for the origins of Deimos and Phobos. Data from the Mars Express OMEGA spectrometer suggest that Deimos has a primitive composition. Like Phobos, Deimos is thought to be quite porous.
Mass: 1.5 × 1015 kg
I agree the density calculations and mass as the unique driver of gravity is questionable, but the OP query was merely asking if gravity had been measured and it has using its moons. The mass of the moons are irrelevant with respect to measuring Mars gravity.comingfrom wrote:Their densities calculate so low, that it is speculated that they are porous, or hollow.Aardwolf wrote:Phobos & Deimos orbits identify the strength of gravity on Mars.
My speculation is that there is something missing from their gravity calculations.
Looking for a reference, I found
From Space.com info page on PhobosThe moon is so small that a 150-pound person standing on its surface would weigh only two ounces.
Mass: 1.0659 x 10^16 kg
Density: 1.872 g/cm^3
Ah, here we go... from the ESA info page on Deimos.Despite remote sensing investigation by Mars Express, Mars Reconnaissance Observer and Mars Global Surveyor, the composition of Deimos has not been resolved. The composition is a key indicator in the search for the origins of Deimos and Phobos. Data from the Mars Express OMEGA spectrometer suggest that Deimos has a primitive composition. Like Phobos, Deimos is thought to be quite porous.
Mass: 1.5 × 1015 kg
Density is 1.7 gm/cm^3
ESA page didn't have the density.
~Paul
What caused this array of various channels and intersecting pits?
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