column density
(chemistry) Any chemical compound with two oxalate groups in its formula
The total amount per unit area of a material suspended in a fluid or in a cloud in space, measured along the length of a column.
In a pioneering manner
Alternative form of reclusory
天文学者たちは、地球と遠方のクエーサーの間にどれだけのガスと塵があるかを推定するために、いくつかの視線に沿った単位面積あたりの物質の総量を計算した。
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