I noticed these things on my tomato plants. What are they and how can I safely get rid of them?
They look more like whitefly to me. The way to tell is to gently shake the plant. If you see insects flying around then they are whitefly. Only some adult aphids can fly but all whitefly can.
I know what this is. I have the same thing and it took me a long time to figure out: https://www.walterreeves.com/gardening-q-and-a/aphids-on-indoor-citrus-tree
The white things are shed skins of the live yellow-green aphids nearby. Have you seen any green bugs on your plant?