Multiple choice general knowledge science & technology In how many years does Halley's comet make its periodic appearance? 30-31years 75-76 years 119-120 years 9-10 years Reveal answer Fill a bubble to check yourself B Correct answer Explanation Halley's comet has a well-documented orbital period of approximately 76 years. The last appearance was in 1986, and the next is expected in 2061. This regular pattern makes it predictable for astronomers to track its appearances.