Halley’s Comet doesn’t necessarily get close to earth. https://solarsystem.nasa.gov/asteroids-comets-and-meteors/comets/1p-halley/in-depth/ https://solarsystem.

Halley’s Comet doesn’t necessarily get close to earth. https://solarsystem.nasa.gov/asteroids-comets-and-meteors/comets/1p-halley/in-depth/ https://solarsystem.nasa.gov/asteroids-comets-and-meteors/co...: “During its 1986 appearance, Halley's nearest approach to Earth occurred on the outbound leg of the trip at a distance of 0.42 AU (39 million miles or 63 million kilometers)“ (The orbit of Venus is at about 0.7 AU, so 0.3 AU from that of earth, so that was further away than Venus can be to earth (https://theskylive.com/how-far-is-venus https://theskylive.com/how-far-is-venus)) It can get a lot closer, though. From that nasa.gov page: “The comet's closest approach to Earth occurred in 837, at a distance of 0.033 AU (3.07 million miles or 4.94 million kilometers)” That’s about 13 times the earth-moon distance.