Formulae contain equals signs, as do equations, so it can sometimes be difficult to tell the difference between an equation and a formula.

“You have to look at [each] person’s whole entire chart,” she tells PEOPLE, which includes their moon and rising signs too. Still, she notes that the element that your sign corresponds to ...

The plural of formula is formulae or formulas. Formulae contain equals signs, as do equations, so it can sometimes be difficult to tell the difference between an equation and a formula.