Comet Halley was named after Edmund Halley because he was the first person to correctly predict its return.

Here's how it happened:

* Observation and Calculation: Halley studied historical records of comet sightings and realized that some of them seemed to be the same comet returning at regular intervals.

* Prediction: Using Isaac Newton's laws of gravity, Halley calculated the comet's orbit and predicted that it would return in 1758.

* Confirmation: Sadly, Halley died in 1742 before seeing the comet's return, but it did appear in 1758, confirming his prediction and solidifying his place in scientific history.

So, the comet was named after Edmund Halley as a tribute to his groundbreaking work in celestial mechanics and his ability to predict its reappearance.