Translation guide
A mysterious form of energy in cosmology that is thought to drive the accelerating expansion of the universe. In Japanese, the term is typically expressed using the loanword ダークエネルギー or the calque 暗黒エネルギー.
Referring to the hypothetical form of energy that permeates space and causes the universe's expansion to accelerate.
The most common and standard term, directly borrowed from English. Used in scientific contexts and popular science.
ダークエネルギーは宇宙の加速膨張を説明するために導入された。
Dark energy was introduced to explain the accelerating expansion of the universe.
A calque of 'dark energy', using the kanji for 'darkness' (暗黒). Less common than the katakana version but still understood.
暗黒エネルギーは宇宙の約70%を占めると考えられている。
Dark energy is thought to make up about 70% of the universe.