1. Richard A. Kowalski ( born 1963 ) is an American astronomer who discovered many asteroids and comets , including numerous near-earth objects .
2. Richard A. Kowalski ( born 1963 ) is an American astronomer who has discovered many asteroids and comets , among them , numerous near-Earth objects .

Select your answer from the options. Are these two sentences paraphrases of each other?
OPTIONS:
(a). no
(b). yes...I think the answer is
(b).