If you wanted a Mercury Comet in 1966, the carmaker offered three versions. First, it was the Comet Caliente, followed by the Comet Cyclone. The top choice was the Comet Cyclone GT, available in ...

Their images showed that the comet's tail was becoming increasingly prominent, while the head of the comet (called the coma) easily rivaled the planet Mercury — which was then shining at ...