QSO-DLA and MW stars column densities
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Large fractions of metals are missing from the observable gas-phase in the interstellar medium (ISM) because they are incorporated into dust grains. This phenomenon is called...
星际介质（Interstellar Medium，ISM）的可观测气相中存在大量金属元素缺失的情况，这是由于金属元素被包裹于尘埃颗粒之中，该现象被称为……
