cosmic dust; space dust; interstellar dust
Scientific term for tiny solid particles in outer space, including interplanetary, interstellar, and intergalactic dust.
Cosmic dust is widely distributed in interstellar space.
The probe brought back samples of cosmic dust to Earth.
Compound of 宇宙 (uchū, 'universe, space') and 塵 (jin, 'dust, trash'). The reading じん for 塵 is the on'yomi, common in scientific compounds.