ハーバード・スミソニアン天体物理学センター
He undertook extensive research to make the pending impact event scenario realistic. Since he and his family were living in Cambridge, Massachusetts, at the time, it was easy for him to get in touch with asteroid expert Timothy Spahr, director of the Minor Planet Center at the Harvard–Smithsonian Center for Astrophysics. When Winters outlined his scenario, the astrophysicist responded "Oh, sure. I can get you your asteroid."