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Solar system stability and solar mass loss research

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2026-10-10 12:34 UTC → 2026-10-10 18:10 UTC · added ~~removed~~

New astrophysical research indicates that the solar system may face significant instability during the Sun’s transition from a red giant to a white dwarf. Studies published in ‘The Astrophysical Journal Letters’ suggest that rather than losing mass gradually, the Sun will undergo ‘stochastic kicks’—violent and irregular bursts of mass loss. These unpredictable gravitational shifts could trigger a ‘dynamical instability’ or ‘violent scattering.’ While previous models suggested giant planets like Jupiter, Saturn, Uranus, and Neptune could maintain stable orbits for up to a quintillion years, new simulations indicate they may enter chaotic orbits or be ejected from the system entirely approximately one billion years after the Sun dies. Recent findings expand on this risk, noting that in approximately 90% of conducted simulations, these massive planets lost orbital stability or were expelled within three billion years of the Sun becoming a white dwarf. This contradicts earlier models suggesting the outer planets would simply move into wider, stable orbits. This instability is attributed to the Sun losing its outer layers unevenly, providing small gravitational impulses that disrupt the system's balance. Observations from the Gaia space telescope support this, showing that binary star pairs are rarer when one star has become a white dwarf, suggesting such stars receive a velocity boost during their transition. Regarding Earth, the Sun’s evolution poses an existential threat. As the Sun exhausts its hydrogen and begins burning helium, it will expand and increase in luminosity. Within approximately 1 billion years, Earth’s average temperatures could exceed 100°C, causing oceans to evaporate and rendering the planet uninhabitable. In the long term, the Sun’s expansion is expected to engulf Mercury, Venus, and Earth, potentially leaving Mars as the sole survivor of the inner solar system.

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