how long will earth exist?

Answer 1

Nobody can tell you exactly. However the word will cease to exist when the Sun expands to become a red giant (at which point the Earth will be inside the Sun).

This will happen between 4 and 5 billion years in the future. The Earth has been around for about 3.5 billion years.

Answer 2

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Answer 3

Nobody knows the exact number but 4 to 6 billion years

Answer 4

Until God says the world is over and that day of execution is here...

Answer 5

4.5 billion years