How to pronounce “protoplanet” in English

The story goes that back when Earth was just a wee protoplanet, it collided with another protoplanet, known as Theia.

how you accrete enough material to get the first protoplanets or planetary embryos, as we call them.

The largest of these planetesimals became baby planets, or protoplanets.

which give us an idea, for example, about how protoplanetary disks actually look like.

Probably, it formed farther out and then migrated in through friction with the accretion with the protoplanetary disk or something.

Then, what was left spread out into a slowly rotating disk like a spinning record— what’s called a protoplanetary disk.

And one 2023 study suggests that, once Earth cooled, it always had water, thanks to hydrogen present in the protoplanetary disk that formed it.