Which highly anticipated comet famously underperformed relative to optimistic predictions in 1973?

Answer

Comet Kohoutek

The visibility and brightness of a comet, even when it passes close to the Sun (perihelion), are not always guaranteed by initial predictions, as factors like nucleus size and activity level can vary. Comet Kohoutek serves as a notable example of this unpredictability. It was an object that generated significant anticipation due to early projections suggesting it would be an exceptionally bright display. However, when it reached its closest approach to the Sun in 1973, it ultimately underperformed significantly relative to those optimistic forecasts, failing to deliver the anticipated spectacular show.

Which highly anticipated comet famously underperformed relative to optimistic predictions in 1973?

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