Can Halley's comet strike a planet in the solar system?

The periodicity of Halley's comet has not changed much due to perturbation from external source. Unless and otherwise new body enters the solar system or there is any serious issue with N-body simulation, then it is reasonable to assume that Comet will not strike any planet. read more

Comet orbits are constantly changing as a result of the influence of the planets. Over millions of years then it is bound to either hit one of the planets, or to be deflected away the solar system, hit the sun or the Earth. That is unless it ends up in one of the few stable positions in our solar system, for instance the Jupiter Trojans. read more

Yes, Halley's Comet is part of the Solar System. It's closest approach to the Sun once every 76 years is between Mercury and Venus. It's furthest distance is out somewhere past Neptune. read more

Unusual for an object in the Solar System, Halley's orbit is retrograde; it orbits the Sun in the opposite direction to the planets, or, clockwise from above the Sun's north pole. The orbit is inclined by 18° to the ecliptic, with much of it lying south of the ecliptic. read more