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The source of the anomaly is of no concern: it could be a concentration of mass in the earth or a distant object in space.
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It makes no difference whether type 400 or 399 is employed.
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The direction of motion is immaterial [or is of no importance (or significance, or consequence)].
Русско-английский научно-технический словарь переводчика. Михаил Циммерман, Клавдия Веденеева. 2003.