• Question: How long has the earth lived?

    Asked by jump130day to Yuri - ESA Team on 28 Jan 2020.
    • Photo: Yuri Yushtein

      Yuri Yushtein answered on 28 Jan 2020:

      About 4.5 billion years ago, about 100 million years after the Sun formed. But then, of course, not the Earth as we see it now – just a hot ball of space dust, in the beginning.

Comments

  • Photo: John - Planetary Team

    John - Planetary Team commented on :

    The Earth is 4565 million (or 4.56 billion) years old (as is Mars btw).
    We know that because of radiometric dating of stony meteorites which are the building blocks of the Solar System.