Alright, here's the breakdown:

1. Bitcoin Core: That's the software many peeps use to run nodes on the network. It's like the official Bitcoin brain.

2. Bitcoin Blockchain: The ledger of all transactions ever made in Bitcoin – a record book that keeps growing.

3. Bitcoin Network: All the people and machines talking to each other, using stuff like Bitcoin Core to trade and mine BTC.

Think of it as a concert: Core is playing tunes (software), blockchain is setlist (ledger), network is everyone there rockin' out (users/miners). 🎸📒👥