light echo
(astronomy) A phenomenon caused by light reflected off surfaces distant from the source, and arriving at the observer with a delay relative to this distance, analogous to an echo of sound.
plural of overview effect
plural of meningioma
Alternative form of there she blows
天文学者たちは超新星の周囲でかすかな反射光のエコーを発見し、何光年も離れた塵の構造を明らかにした。
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