Assertion: meteorite's composition | /r/HasProperty | isotopic
Facets:
Source sentences:
text: These meteorites are thought to be from Mars because they have elemental and isotopic compositions that are similar to rocks and atmospheric gases on Mars, which have been measured by orbiting spacecraft, surface landers and rovers.
text: The 214 meteorites are thought to be from Mars because they have elemental and isotopic compositions that are similar to rocks and atmosphere gases analyzed by spacecraft on Mars.