This episode's headline: The Shuttle Challenger. The guests include In New York: JERRY SCOTT, Former Astronaut; JERRY GREY, Aerospace America; In Syracuse, New York: THOMAS GOLD, Astronomer; In Houston: Col. DONALD PETERSON, Former Astronaut; Reports from NewsHour Correspondents: MARYANNE KANE, Concord, New Hampshire; CHARLAYNE HUNTER-GAULT. Byline: In New York: ROBERT MacNEIL, Executive Editor; In Washington: JIM LEHRER, Associate Editor; JUDY WOODRUFF, Correspondent