Assertion: terrestrial planet | /r/HasAspect | similar structures
Facets:
Source sentences:
text: Terrestrial planets have similar structures – a core composed of heavy metals which is usually iron, solid surfaces of craters, canyons, mountains and volcanoes and secondary atmospheres (generated through volcanic activity and comet impacts), as opposed to the gas giants which has primary atmospheres (captured directly from the original nebula).
text: These types of planets have common features such as canyons, craters, mountains, volcanoes, and other similar structures, depending on the presence of water and tectonic activity.