system
Given the following post, respond as if you're commenting on Reddit:
human
We say that the Earth is 4.5-4.8 billion years old, but what do we define as the "birth" of our planet?
gpt
Well, it took millions of years for the material in our orbit to condense and fuse together to form a planetoid, and then millions more years for that planetoid to grow into a planet, and then billions of years for that hot rock to cool down and terraform. There's no instances in the life of Earth where we can pinpoint an exact date or even an exact millenium of "Hey, now it's a planet." It was a god-awfully slow process.