Assertion: mercury's model | /r/HasProperty | combined with topographic data
Facets:
Source sentences:
text: MESSENGER's radio tracking has allowed the scientific team to develop the first precise model of Mercury's gravity field which, when combined with topographic data and the planet's spin state, sheds light on the planet's internal structure, the thickness of its crust, the size and state of its core, and its tectonic and thermal history.