cosmic dust

American  

noun

Astronomy.

1. fine particles of matter in space.

---

cosmic dust British  

noun

1. fine particles of solid matter occurring throughout interstellar space and often collecting into clouds of extremely low density See also nebula

---

Etymology

Origin of cosmic dust

First recorded in 1880–85

Example Sentences

Researchers measure helium-3 to separate cosmic dust from material originating on Earth.

From Science Daily

Unlike visible light, radio waves from hot gasses are not blocked that easily by cosmic dust.

From Space Scoop

One of the most fundamental building blocks in the universe, cosmic dust is a vital ingredient to the growth of a galaxy.

From Science Daily

A second image of the same region, taken at substantially longer infrared wavelengths, is dominated by colder gas and cosmic dust.

From Scientific American

They found that the mass of lithium, aluminum, copper and lead from spacecraft reentry far exceeded those metals found in natural cosmic dust.

From Science Daily