What the Sun may have been like 4 billion years ago (IMAGE)

NASA/Goddard Space Flight Center

What the Sun may have been like 4 billion years ago

Caption

Illustration of what the Sun may have been like 4 billion years ago, around the time life developed on Earth.

Credit

NASA's Goddard Space Flight Center/Conceptual Image Lab

Usage Restrictions

No restrictions.

License

Public Domain

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