New Hope for Earth: Our Planet May Survive the Sun’s Death

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PARIS: Earth may escape its previously assumed fate of being engulfed by the dying Sun in five billion years, according to new scientific modelling. While the Sun has long been predicted to expand into a red giant and then an ‘AGB’ star, eventually consuming our home planet, recent findings suggest the Earth could survive this cosmic event.

The planet's survival depends on a delicate gravitational tug-of-war. As the Sun expands, it pulls Earth inward; however, the Sun simultaneously loses significant mass through its stellar wind, which pushes the planet farther away into a larger, safer orbit. Previously, scientists believed the inward tidal pull would dominate, leading to Earth's destruction.

New research published in Astronomy & Astrophysics uses advanced modeling to reveal that tidal dissipation in giant stars is lower than previously expected. By studying ‘old cousin’ stars like L2 Puppis, researchers have updated their understanding of mass loss and tidal physics. 

Consequently, current projections indicate that Earth and Mars may drift away to safety, leaving the Sun to eventually cool as a white dwarf.

While Mercury and Venus remain fated to be swallowed by the expanding fireball, Earth’s prospects appear significantly more optimistic than once thought.