Our Solar System Is Terminally Unstable and Will Be Completely Destroyed, Study Finds
The outer solar system faces terminal instability and total destruction much sooner than previously estimated. A study published in The Astrophysical Journal Letters reveals the estimated lifespan of the outer solar system has dropped from 100 billion years to just a few billion years. This instability occurs during the death of the Sun, which will eventually transition into a white dwarf. While the outer planets face eventual ejection into the universe, the inner planets Mercury, Venus, and Earth will be engulfed first during the Sun's red giant phase.
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- ✓ The estimated lifespan of the outer solar system has been downgraded from 100 billion years to just a few billion years.
- ✓ The solar system's instability occurs during the death of the Sun.
- ✓ The outer planets could be thrown out into the universe after the Sun turns into a white dwarf.
What changed
A study in The Astrophysical Journal Letters downgraded the outer solar system's lifespan from 100 billion years to a few billion years.
Live updates
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Study Finds Outer Solar System Lifespan Reduced to a Few Billion Years
The outer solar system faces terminal instability and total destruction much sooner than previously estimated. A study published in The Astrophysical Journal Letters reveals the estimated lifespan of the outer solar system has dropped from 100 billion years to just a few billion years. This instability occurs during the death of the Sun, which will eventually transition into a white dwarf. While the outer planets face eventual ejection into the universe, the inner planets Mercury, Venus, and Earth will be engulfed first during the Sun's red giant phase.
Why it matters
The lifespan of a solar system depends on the gravitational stability of its planets as the host star evolves. Previous models suggested a much longer period of stability for the outer reaches of our system. This new timeline accelerates the projected collapse of the planetary arrangement.
What is confirmed
- The estimated lifespan of the outer solar system has been downgraded from 100 billion years to just a few billion years.
- The solar system's instability occurs during the death of the Sun.
- The outer planets could be thrown out into the universe after the Sun turns into a white dwarf.
Still unconfirmed
- Earth, Venus and Mercury will be among the first casualties when the expanding Sun engulfs them during its red giant phase.
What to watch next
- Further peer review of the Astrophysical Journal Letters study
- Additional simulations of planetary orbits during the Sun's white dwarf transition
confidence 90%Sources used for this update (12)
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