Most meteors are the size of a grain of sand and burn up in the atmosphere.
These spooky recordings were provided by Steven Bienvenu . Cosmic dust comes from asteroids and comets. For one thing, it may be our only source of cometary material. They probably represent the least altered remnants of the original Solar System building blocks, in cold storage for 4.5 billion years. Some particles appear to have preserved materials that predate our Solar System, containing samples of molecular clouds, and perhaps stardust.