The estimated lifespan of planet Earth is a subject of scientific speculation and calculation. It is important to note that determining the exact lifespan of a planet is challenging, as it depends on various factors and events that may occur in the future. However, scientists have made predictions based on our current understanding of planetary science.
The most widely accepted estimate is that the Earth will remain habitable for several billion more years. It is believed that the Sun, which is our planet’s primary energy source, will gradually increase in brightness over time as it exhausts its nuclear fuel. This process, known as stellar evolution, will lead to changes in the Earth’s climate and environment.
In approximately 1 to 1.5 billion years, the increasing solar radiation is expected to cause a runaway greenhouse effect, leading to the evaporation of the oceans and rendering the planet uninhabitable for most forms of life. This stage is often referred to as the “moist greenhouse” phase.
Around 4 to 5 billion years from now, the Sun will enter its red giant phase, during which it will expand in size and engulf the inner planets, including Earth. This event will mark the end of our planet’s existence.
It’s worth mentioning that these estimates are based on current scientific understanding and models, which can evolve as new research and discoveries emerge. Additionally, unforeseen events or external factors could significantly alter the Earth’s lifespan.