What Comet Comes Every 100 Years?
What Comet Comes Every 100 Years? Discovery Semi-major axis 17.834 AU Eccentricity 0.96714 Orbital period 75.32 yr Mean anomaly 38.38° What comet visits every 76 years? The famous comet named for astronomer Edmond Halley only passes by the Earth roughly once every 76 years, but its appearances have often played a surprising role in historical