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A Timeline of Earth’s Final Days and Ultimate Death

5 to 7 Billion Years from Now:

  • The Sun Becomes a Red Giant:
    The Sun, having depleted much of its hydrogen and helium fuel, will begin expanding. It will grow to 256 times its current size, becoming a red giant star.

5 Million Years After the Red Giant Phase Begins:

  • Inner Solar System Engulfed:
    The red giant will engulf Mercury and Venus as it expands through the inner solar system. Earth will experience extreme heat, drastically altering its climate and environment.

Effects on Earth’s Atmosphere and Life:

  1. Carbon Depletion:
    High temperatures will prevent the carbon cycle from replenishing atmospheric carbon dioxide.
  2. Plant Death:
    The lack of carbon dioxide will kill all plant life, halting oxygen production.
  3. Mass Extinction of Animals:
    The decline in oxygen levels will lead to the extinction of mammals and birds. Organisms requiring minimal oxygen will survive slightly longer.
  4. End of Insects:
    Rising temperatures will wipe out the planet’s insect population.
  5. Microbial Life:
    Only extremophiles, such as tardigrades, capable of withstanding high radiation and temperatures, will survive.

Earth’s Transformation:

  • Extreme Heat and Rainstorms:
    Intense heat will drive torrential rains and violent winds, further degrading Earth’s surface.
  • Loss of Atmosphere:
    Earth’s atmosphere will evaporate, leaving a barren surface covered in metals and metal oxides.
  • Lava Oceans:
    The boiling of Earth’s oceans will lead to the formation of vast lava oceans. Without water, tectonic activity will cease entirely.

7.6 Billion Years From Now:

  • Earth and Moon Engulfed:
    The Sun, now a massive red giant, will likely consume both Earth and its moon.
  • New Habitable Zone:
    As the Sun’s habitable zone shifts outward, regions in the Kuiper Belt, including icy worlds like Neptune’s moon Triton and the dwarf planet Eris, may melt, forming liquid water and becoming potential locations for human settlement.

1 Quadrillion Years from Now:

  • Sun Becomes a Black Dwarf:
    The Sun, after shedding its outer layers and becoming a white dwarf, will eventually cool into a black dwarf—a cold, inert remnant approximately the size of Earth.

Earth’s journey from a vibrant, life-sustaining planet to a desolate, uninhabitable world illustrates the immense power and impermanence of cosmic forces. The timeline reminds us of the fragility of life and the universe’s relentless progression. Future human ingenuity may allow us to survive and adapt far beyond Earth, colonizing new frontiers in the solar system and beyond.

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