dust grains

Dust grains are tiny particles, much smaller than a grain of sand, that float in space or settle on surfaces. They are made of various materials like silicates, carbon, ice, and metals. In space, these particles originate from stars, planets, and cosmic events, and play a key role in forming new stars and planets by clumping together under gravity. On Earth, dust grains can be found in the atmosphere, on surfaces, and in soils, affecting climate, health, and ecosystems. Their small size makes them influential in processes like light scattering and chemical reactions.