While you are affected by gravity, it'd have less of an effect than other things.

For instance we can scientifically show your birth date does influence your personality, as long as you don't live on the equator.

The further North/South you go, the more pronounced the effect becomes.

That is to say that from large samplings, you can see that extroverted traits are more common with babies born in Spring (in the Northern hemisphere), while introversion is more associated with being born in autumn.

That ofc doesn't mean that a person who was born in November will automatically be less extroverted than one born in March, but if you pick two random people from those groups, it's X% more likely that it is so.

Astrology is complete fucking bullshit though.