You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.
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Question: Category: OF A MAN NAMED BRADY 
Clue: In 2007 this Patriots QB from Michigan threw a single-season record 50 TD passes

Answer: tom brady


Question: Category: SCIENCE & NATURE 
Clue: Developed by astronomer A.E. Douglass, dendrochronology determines age in this way

Answer: counting tree rings


Question: Category: ROCK OF AGELESS 
Clue: Al Rappa, who started as part of this group with Bill Haley in 1956, now leads the group, Bill being dead

Answer:
the comets