I haven’t mentioned fluff in writing for a while. Fluff is one or more unnecessary words in what you (or someone) writes. You can also call this redundancy in writing. I hear people say “tiny little” a lot, as if it were one word. Here’s something similar:
Meteors are tiny dust-size particles of rock and metal that Earth passes through as it orbits the Sun.
Take out “tiny”! Or take out “dust-size.”
If I may also wax astronomical, I shall add that the sentence describes particles that are too small. I don’t think a dust particle has enough molecules to create a flash of light bright enough to make a streak seen over a large area dozens of miles away.