RT Generic DB /z-wcorg/ DS http://worldcat.org ID 22038028 LA English T1 Journeys in space and time A1 Sagan, Carl,, KCET (Television station : Los Angeles, Calif.), Carl Sagan Productions., Turner Home Entertainment (Firm), PB Turner Home Entertainment PP [S.l.] YR 1989 SN 1559603100 9781559603102 AB With Carl Sagan we circle around the Big Dipper to see it from a new perspective. In a time machine, we explore what would happen if the past could be altered. We travel to the planets of other stars. We retrace the teen-age Albert Einstein's reverie about traveling on a beam of light; his theory of relativity predicts strange effects that arise from travel near the speed of light.