Our Solar System Is Going to Totally Disintegrate Sooner Than We Thought - ScienceAlert

According to new simulations, it will take just 100 billion years for any remaining planets to skedaddle off across the galaxy, leaving the dying Sun far behind.

Then it will eject nearly half its mass, blown away into space on stellar winds; the remaining white dwarf will be around just 54 percent of the current solar mass.

This mass loss will loosen the Sun's gravitational grip on the remaining planets, Mars and the outer gas and ice giants, Jupiter, Saturn, Uranus, and Neptune.

Secondly, as the Solar System orbits the galactic centre, other stars ought to come close enough to perturb the planets' orbits, around once every 23 million years.

After the Sun completes its evolution into a white dwarf, the outer planets have a larger orbit, but still remain relatively stable.

Jupiter and Saturn, however, become captured in a stable 5:2 resonance - for every five times Jupiter orbits the Sun, Saturn orbits twice (that eventual resonance has been proposed many times, not least by Isaac Newton himself).

Ultimately, by 100 billion years after the Sun turns into a white dwarf, the Solar System is no more.