Assertion: mercury's motion | /r/CapableOf | exceed rotational motion
Facets:
value: at perihelion
type: LOCATION
Source sentences:
text: In fact, if the calculations are done very accurately instead of in the approximate way just described, it turns out that at perihelion the orbital motion actually EXCEEDS the rotational motion, so that the Sun slows, stops moving to the west, and starts slowly moving to the east.