As an adverb, so is associated withthe conjunction that and means"enough." Very means "extremely."
The moon is so close to the earththat its gravitational effects are readilyobservable through the tides of the oceans.
Surface temperatures on Mercury are veryhot.
Do not use so to mean extremely. Use very.
Mercury is so close to the sun.
Mercury is very close to thesun.
The word very can often be omitted,and when it can be it should be.
Mecury is close to the sun.
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