> How does one define the moment of formation? We don't. It's usually within a range. My illustrated book shows the timeline with more context and detail. Note

> How does one define the moment of formation? We don't. It's usually within a range. My illustrated book shows the timeline with more context and detail. Note that the events are provided on a timeline with some uncertainty (e.g., ± 1 million years): https://impacts.to/downloads/lowres/impacts.pdf https://impacts.to/downloads/lowres/impacts.pdf