Is Ethereum on cosmos?

Excuse me, I'm a bit confused about the blockchain landscape. Could you please clarify for me whether Ethereum is part of the Cosmos ecosystem? I've heard a lot about Cosmos and its interoperability features, and I'm trying to understand how various blockchains fit into the bigger picture. Is Ethereum somehow integrated or connected to Cosmos? Or are they completely separate entities? Your expertise in this field would be greatly appreciated.