| 单词 | einstein cross |
| 释义 | Einstein crossEinstein cross(ÿn -stÿn) A gravitationally-lensed image of a distant quasar (redshift 1.7) by a foreground (redshift 0.039) spiral galaxy. The image of the quasar is split into four point sources forming a cross at the center of the galaxy. Gravitational microlensing has been observed as variations in the light between the four components. See gravitational lens. |
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