There is no credible evidence that star positions at birth determine personality. Astrology has failed every rigorous double-blind test.
The Season of Birth Effect
Researchers have found statistical associations between birth month and surprising outcomes. People born in winter are slightly overrepresented in schizophrenia diagnoses — likely due to maternal vitamin D deficiency during pregnancy.
The Barnum Effect
Much of astrology appeal comes from the Barnum effect: people accept vague, generally applicable descriptions as uniquely accurate about themselves.
The stars do not determine your character, but they might rhyme with it — through biology, environment and the stories we tell about ourselves.