If a romantic evening spent with an astrological match feels more like a misalignment of the stars than a perfect date, you could blame it on the Earth’s wobble.

As the planet spins on its axis, it teeters back and forth like a child’s top, and after millennia of staggering along its path around the sun, it no longer aligns with the constellations of the zodiac on the dates that were established in ancient times.

Because of that, Leo ain’t what he used to be—and neither are Aries, Taurus, Gemini nor any of the rest.

In astronomical terms, the wobble is known as precession, and it’s caused by gravity tugging on the Earth’s distended midriff.

“The Earth bulges at the equator, and the gravitational pull of the sun and Moon together act on that bulge,” said James B. Kaler, professor emeritus of astronomy at the University of Illinois at Urbana-Champaign.