Bright idea. (Letters)."Jet Astronomy astronomy, branch of science that studies the motions and natures of celestial bodies, such as planets, stars, and galaxies; more generally, the study of matter and energy in the universe at large. " (SN: 11/9/02, p. 299) notes that X-ray radiation from XTE XTE X-Ray Timing Explorer XTE Cross Track Error J1550-54 jets is puzzling because the radiation of the nearer jet, which is moving toward Earth, isn't as bright as that of the more distant jet. Perhaps as a jet strikes material, the radiation is dispersed dis·perse v. dis·persed, dis·pers·ing, dis·pers·es v.tr. 1. a. To drive off or scatter in different directions: The police dispersed the crowd. b. back toward the jet source. Thus, the more distant jet could appear brighter. T.L. POPPELBAUM, CLINTON, N.Y. |
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