Cosmic dust consists of tiny particles found in space, primarily made up of elements like carbon, silicon, and iron. These particles play a crucial role in the formation of stars and planets, as they provide the necessary building blocks for these celestial bodies. Cosmic dust can be found in various regions of the universe, including nebulae and galaxies. In addition to its role in star formation, cosmic dust also affects the light we see from distant objects. It can absorb and scatter light, which can lead to the dimming of stars and the reddening of their colors. Understanding cosmic dust helps astronomers learn more about the universe and its evolution over time.