Answer :
Final answer:
Halley's comet is only visible every 75-76 years due to its orbit around the sun. It is too far away to be visible at certain points of its elliptical orbit.
Explanation:
Halley's comet is only visible every 75-76 years because it takes that long for the comet to orbit the sun. The comet follows an elliptical orbit, and at its furthest point from the sun, it is too far away to be visible from Earth. As it gets closer to the sun, the comet is heated and begins to release gases and dust, creating a glowing coma and a tail that can be seen from Earth.
Learn more about Halley's comet's visibility here:
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