【单选题】

"There is very little in my life that is more personal and more important to me than comets. " The amateur astronomerDavid H. Levy told TerenceDickinson in an interview. "Not just discovering them but watching them, learning about them, writing about them, understanding what they do. It makes observing the sky intensely personal. I feel when I find a new comet that a door has been opened and I have seen a slightly new aspect of nature. There is this object in the solar system that — for a few minutes or a few hours — only I know about. It is like trying to pry a secret out of nature. It is a very special feeling. "

Ever since he was a child,David Levy has been fascinated by the night sky and the wonders it reveals to devoted watchman. He developed a special feeling for comets before he reached his teens, though it was not until 1984 — after nineteen years and more than nine hundred hours of combing the sky in search of them — that he discovered his first one, from a small observatory that he had built in his backyarD、
Since then, he has discovered or co-discovered twenty more, making him one of the world’s most important comet hunters. His most celebrated find is periodic comet Shoemaker Levy 9, which he made with the husband-and-wife comet and asteroid hunting teamEugene andCarolyn Shoemaker. The comet’s dramatic collision with Jupiter in July 1994, which constituted "the greatest planetary show in recorded history, " to quote Malcolm W.Browne of the New York Times, captivated not only professional astronomers, but many amateurs.Although he is "only" an amateur astronomer, he earns his living by lecturing and writing books and by working with project artists. They’re projects devoted to introducing astronomy to elementary school children. He has won tremendous respect from his professional colleagues for his success in tracking comets. "David Levy is one of those rare individuals blessed with the gift of discovery, "David Hartsel, who serves on the board of directors of the RichlandAstronomical Society, in Ohio, has saiD、"Even rarer is his ability to let others share in the excitement and wonder of those discoveries through his writing and lectures. \
It can be inferred from the passage that ______.
A、Levy’s parents are astronomers
B、Levy was born in the l960s
C、Levy achieved his fame in the 1980s
D、Levy himself has discovered 21 comets altogether