Halley’s Comet returns to the inner solar system about once every 75–76 years, though the interval can vary by a few years.
Typical interval
Astronomers classify Halley’s Comet as a short‑period comet with an orbital period of roughly 76 years. Due to gravitational tugs from planets, especially the giant planets, individual intervals have been observed between about 72 and 80 years.
Recent and next appearances
Halley’s Comet was last visible from Earth in 1985–1986. Its next close approach to the Sun and good viewing opportunity from Earth is expected around the year 2061.
