Minuscule dust particles can clump together to form entire planets, and they seem to require help from static electricity so they don’t bounce off one another
Source:
https://www.newscientist.com/article/2226444-we-finally-know-how-whole-planets-grow-from-tiny-clumps-of-dust/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home