# What will happen when our sun dies?

Kirstie Ransburg asked, updated on February 9th, 2023; Topic: sun
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βIn this process of the sun becoming a red giant, it's likely going to obliterate the inner planets β¦ likely Mercury and Venus will be destroyed,β Blackman said. Earth may survive the event, but will not be habitable. Once the sun completely runs out fuel, it will contract into a cold corpse of a star β a white dwarf.

Even so, how long would we live if the Sun died?

A relatively simple calculation would show that the Earth's surface temperature would drop by a factor of two about every two months if the Sun were shut off. The current mean temperature of the Earth's surface is about 300 Kelvin (K). This means in two months the temperature would drop to 150K, and 75K in four months.

In addition to that, will our sun ever die? The Sun is about 4.6 billion years old β gauged on the age of other objects in the Solar System that formed around the same time. Based on observations of other stars, astronomers predict it will reach the end of its life in about another 10 billion years.

Into the bargain, what year will Earth be destroyed?

By that point, all life on the Earth will be extinct. The most probable fate of the planet is absorption by the Sun in about 7.5 billion years, after the star has entered the red giant phase and expanded beyond the planet's current orbit.

Can we survive without sun?

All plants would die and, eventually, all animals that rely on plants for food β including humans β would die, too. While some inventive humans might be able to survive on a Sun-less Earth for several days, months, or even years, life without the Sun would eventually prove to be impossible to maintain on Earth.

### What if the sun disappeared for 5 seconds?

Consider this: if the sun was to disappear for exactly five seconds it would be 8.2 minutes AFTER the fact before anyone on Earth would even know that it had happened, so by the time we were aware the event would have passed.

### What was the Earth like 4 billion years ago?

4 billion years ago, a first Earth crust was formed, largely covered by a vast salty ocean containing soluble ferrous iron. Asteroids brought water and small organic molecules. Other molecules were formed in the ocean.

### What will humans look like in 1 million years?

In the year 1 million, Earth's continents will look roughly the same as they do now and the sun will still shine as it does today. But humans could be so radically different that people today wouldn't even recognize them, according to a new series from National Geographic.

### What if the moon disappeared?

It is the pull of the Moon's gravity on the Earth that holds our planet in place. Without the Moon stabilising our tilt, it is possible that the Earth's tilt could vary wildly. It would move from no tilt (which means no seasons) to a large tilt (which means extreme weather and even ice ages).

### What would happen if the moon exploded?

If the moon exploded, the night sky would change. We would see more stars in the sky, but we would also see more meteors and experience more meteorites. The position of the Earth in space would change and temperatures and seasons would dramatically alter, and our ocean tides would be much weaker.

### How long do we have to save the Earth 2021?

The Climate Clock, a website powered by scientists, artists, educators and activists across the world, currently says that in order to have a two-thirds chance of staying under the critical threshold of 1.5Β°C warming, we must achieve near-zero emissions in less than seven years.

### How cold would Earth be without the Sun?

And without sunlight, the Earth would get very, very cold. Earth's surface temperature now averages about 57 degrees Fahrenheit, but by the end of the first week without the sun, the average surface temperature would be below the freezing point.
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