Assertion: heliosphere's wind | /r/HasProperty | supersonic
Facets:
value: highly
type: DEGREE
Source sentences:
text: At a distance of more than a few solar radii from the Sun, the solar wind reaches speeds of 250 to 750 kilometers per second and is supersonic, meaning it moves faster than the speed of the fast magnetosonic wave.[citation needed]
text: It is implicit in this relationship, essentially the same as used currently, that the solar wind is highly supersonic and therefore the left hand side of equation (1) need contain only the solar wind ram pressure.