What would happen to earths gravitational attraction if the sun feel into a black hole?

Answer 1

If the sun abruptly was replaced with a black hole of the same mass, or if a black hole happened to wander into the solar system and consume the Sun, the Earth would respond as before with a gravitational attraction or force proportional to its mass and inversely proportional to the square of its distance. It wouldn't matter if the mass were in a black hole or in a star like the sun, no distinction would be made, so to speak. Depending on the mass of the black hole in the event in question and any momentum it contributed to the position of the Sun's mass so consumed (which total mass, again, would be preserved), the Earth's orbit and those of the other planets would be perturbed accordingly. Likely it would take a very long time for orbits to stabilize and cataclysmic effects would probably ensue if the mass and momentum change were significant, not to mention the Earth would be plunged into a perpetual night.