Stardust (noun)

Very fine powder made up of tiny pieces of meteorites, space debris, and other cosmic matter that have fallen to Earth.

Origin:

From star + dust, perhaps influenced by german starduft.

Examples:

1. The stardust was collected from the surfaces of comet Wild 2 by NASA's Stardust spacecraft.
2. The study of stardust provides scientists with important information about the origins of our solar system.
3. The stardust particles are so small that they can only be studied using specialized equipment.
4. The stardust gives the night sky a magical and enchanting look.
5. The stardust theory suggests that life on Earth may have originated from comets.