Astronomers predict that in about 5 billion years, our sun will transform into a red giant and may engulf Mercury, Venus, and possibly Earth.

Astronomers have revealed that in approximately 5 billion years, our sun will undergo a transformation into a red giant, a phase that could lead to the engulfment of Mercury, Venus, and potentially Earth.¹²³⁴

This prediction aligns with observations of TOI-5882, a sun-like star located about 1,300 light-years away, which has shown evidence of having consumed one of its planets.

Brooke Kotten, a researcher at the University of Michigan, noted, "You are what you eat, right?" This phrase underscores the relationship between a star's composition and its consumption of planetary material.

The presence of lithium in TOI-5882 suggests that it has recently engulfed a planet, as stars typically lose lithium over time. The researchers suspect the consumed planet had a mass between that of Earth and Neptune.

As our sun expands into a red giant, it will not only change its own structure but also impact the inner solar system significantly. The process of engulfment can occur rapidly, sometimes within days or weeks, making it difficult for observers to witness the event.

Kotten emphasized the importance of lithium as a forensic tool in understanding these cosmic events, stating, "Lithium is a powerful piece of forensic evidence because, although stars have some naturally, planets are heavily enriched in it."

The fate of TOI-5882 serves as a cautionary tale for our solar system, highlighting the inevitable changes that await our sun in the distant future.