Sure he was. And then Newton came along and said it's all because of gravity and Kepler's laws were nothing but his laws of motion applied to planets. Newton w

Sure he was. And then Newton came along and said it's all because of gravity and Kepler's laws were nothing but his laws of motion applied to planets. Newton was a bit of a brat but everybody accepted his explanation. Then the problem turned to trying to explain gravity. Thus science advances, one explanation at a time.