absorption nebula
Third-person singular simple present indicative form of undercrest
Not tutorial.
(astronomy) A dark nebula; a diffuse mass of interstellar gas and dust that absorbs all incident radiation without reemission.
(biology, rare) Misspelling of apoptotic.
天文学者たちは遠方の星団の星光を遮る暗黒星雲を撮影した。
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