solar apex vs apex of the sun's way

solar apex and apex of the sun's way both are nouns.

Word	Noun	Adjective	Verb	Adverb
solar apex	Yes	No	No	No
apex of the sun's way	Yes	No	No	No

As nouns, solar apex and apex of the sun's way are synonyms defined as:

solar apex and apex of the sun's way: the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars

Other synonyms of solar apex include apex.

solar apex (noun)	apex of the sun's way (noun)
the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars	the point on the celestial sphere toward which the sun and solar system appear to be moving relative to the fixed stars