What is the lifespan of the earth? Astronomy Our Solar System The Earth 1 Answer George C. Feb 29, 2016 Probably about #12# billion years Explanation: The Earth formed about #4.6# billion years ago. It will probably be destroyed when the sun engulfs it during its red giant phase in about #7.5# billion years. Answer link Related questions What's the Earth's "absolute" speed? i.e. in relation to the central Sun, the first-order star,... How does density affect earth's layers? How fast does the earth rotate? How does this compare to the rotation of other planets? At what speed does the earth travel on its orbit around the sun? What would happen if the earth's rotation was faster or slower? How fast does earth rotate near the equator? How fast does the earth rotate per second? How fast is the earth traveling along its orbit? How fast does the earth rotate on its axis? How fast does the earth rotate in one minute? What is the formula to determine this? See all questions in The Earth Impact of this question 2351 views around the world You can reuse this answer Creative Commons License