Dust may be annoying around your house, but it’s much more important on a larger scale than you may realize. Cosmic dust is what is present around young stars and is the material used to help them form. This dust is also the raw material from which planets like Earth are formed. Examples of cosmic dust can be observed not only all around us, but up in the sky in the form of comet tails. Space is one of three sources of dust on Earth. Click the image to learn more!