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Earth Has Reached Half Its Lifespan – And One Day the Sun Will Swallow It
Scientists believe that our planet, Earth, is now roughly halfway through its total lifespan. Formed around 4.5 billion years ago, Earth has supported life for much of that time — but its future is ultimately tied to the fate of our parent star, the Sun.
How Old Is Earth?
Earth was born about 4.54 billion years ago from a swirling cloud of gas and dust left over after the Sun ignited. Over billions of years, it cooled, oceans formed, continents shifted, and life emerged.
The Sun itself is currently about 4.6 billion years old and is expected to live for roughly 10 billion years in total. That means both the Sun and Earth are, in cosmic terms, middle-aged.
The Sun’s Slow but Deadly Transformation
Right now, the Sun is in what astronomers call its “main sequence” phase — steadily burning hydrogen into helium at its core. However, stars do not remain stable forever.
In around 5 billion years, the Sun will exhaust the hydrogen fuel in its core. When that happens, it will begin to expand dramatically, transforming into a red giant. As it grows, its outer layers could stretch beyond the current orbit of Mercury and Venus — and possibly reach Earth.
Whether Earth will be fully swallowed or merely scorched into a lifeless cinder remains debated among scientists. But either way, the planet will become completely uninhabitable long before the Sun physically engulfs it.
Life Will End Long Before That
The real crisis for life on Earth will come much sooner.
As the Sun gradually grows brighter — a natural part of stellar evolution — temperatures on Earth will rise. In about 1 to 1.5 billion years, scientists predict Earth’s oceans will begin to evaporate. The atmosphere will change dramatically, triggering a runaway greenhouse effect. Complex life will not survive these conditions.
Even without being swallowed, Earth will effectively be dead.
What Happens After?
After its red giant phase, the Sun will shed its outer layers into space, creating a glowing cloud known as a planetary nebula. At its core will remain a dense stellar remnant called a white dwarf.
By that point, Earth — if it still exists — would be a charred, airless rock orbiting a dying star.
A Cosmic Perspective
While the idea of Earth being consumed may sound alarming, these events are unimaginably far in the future. Humanity has existed for only a tiny fraction of Earth’s history — about 300,000 years.
On a cosmic timescale, we are living in the most stable and life-friendly period our planet will ever have.
The fact that Earth has reached roughly half of its natural lifespan is not a warning of imminent disaster — but it is a reminder of how precious and temporary our planet’s habitable window truly is.
Attached is a news article regarding the earth has reached half of its life span and will then be consumed by the sun in the end.
https://www.tyla.com/news/earth-halfway-lifespan-sun-dead-planet-400983-20260217
Article written and conducted by Christopher Stanley
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