1st planetary body seen by satellite was a comet hitting Sun
Comet Howard-Koomen-Michels was the first recorded comet to collide with the Sun on August 31, 1979, and also the first-ever planetary body discovered by a spacecraft. It hit the Sun at over 10 lakh kmph, producing energy equal to one million hydrogen bombs. The comet's head disappeared while its decapitated tail continued brightening the corona until it was blown away.