Earth's axis wobbles ~1° every 72 years. Watch how your birth constellation shifts across millennia.
Your Real IAU Constellation
Born Jun 15, 1990
Same constellation as your birth year — no shift yet
Axial precessionis the ~26,000-year wobble of Earth's rotational axis. It shifts which stars are overhead during each season, moving the Sun's apparent path through the constellations by roughly one full sign every 2,160 years. The IAU formalized constellation boundaries in 1930 based on the actual sky.