Halley's Comet is the only known short-period comet that is consistently visible to the naked eye from Earth, appearing every 72-80 years. It last appeared in the inner parts of the Solar System in 1986 and will next appear in mid-_________?
- A. 2065
- B. 2061
- C. 2040
- D. None of These
Explanation
Halley's Comet takes about 75 years to orbit the Sun, so its return after 1986 is expected in 2061. Its long period distinguishes it from comets that return within a few years.