# Sun's End-of-Life Density: Comparing to Earth's Water & Atm.

• monix11
In summary, the Sun's end-of-life density is much higher than Earth's water and atmosphere, with a density of about 1,000,000 grams per cubic centimeter compared to 1 gram per cubic centimeter for water and 0.0012 grams per cubic centimeter for atmosphere. This density ultimately determines the size of the Sun, as it becomes smaller and denser while the outer layers expand. The increased density also significantly impacts the Sun's gravitational pull, potentially pulling nearby objects towards it. Compared to other stars, the Sun's end-of-life density is relatively average, with about 97% of all stars eventually becoming white dwarfs. However, it cannot be directly observed from Earth due to its intense heat and brightness
monix11
Near the end of its life, the sun's radius will extend nearly to the distance of the Earth's orbit. I don't understand how to estimate the volume of the sun at that time using the formula for the volume of a sphere (4 pie r^3/3). Using that result, estimate the average matter density of the sun at that time. How does that density compare with the density of water (1g/cm^3)? How does it compare with the density of Earth's atmosphere at sea level (about 10^-3g/cm^3)?

What is the distance from the sun to the earth?

## 1. What is the density of the Sun's end-of-life compared to Earth's water and atmosphere?

The density of the Sun's end-of-life is much higher than that of Earth's water and atmosphere. The Sun's core will collapse, causing it to become a white dwarf with a density of about 1,000,000 grams per cubic centimeter, while Earth's water has a density of only 1 gram per cubic centimeter and its atmosphere has a density of about 0.0012 grams per cubic centimeter.

## 2. How does the Sun's end-of-life density impact its size?

The Sun's end-of-life density ultimately determines its size. As the Sun's core collapses, it will become smaller and denser. This will cause the outer layers of the Sun to expand, making it much larger than its current size. However, as it becomes a white dwarf, it will eventually cool and shrink in size.

## 3. Will the Sun's end-of-life density affect its gravitational pull?

Yes, the Sun's end-of-life density will significantly impact its gravitational pull. As the Sun's core collapses and it becomes denser, its gravitational pull will become much stronger. This will have a gravitational effect on nearby objects, potentially pulling them towards the Sun.

## 4. How does the Sun's end-of-life density compare to other stars?

The Sun's end-of-life density is relatively average compared to other stars. It is estimated that about 97% of all stars in the universe will eventually become white dwarfs, making it a common end-of-life phase for stars. However, there are some stars, known as neutron stars, which have even higher densities than white dwarfs.

## 5. Can the Sun's end-of-life density be observed from Earth?

No, the Sun's end-of-life density cannot be directly observed from Earth. It is estimated that the Sun will end its life in about 5 billion years, and by that time, Earth will no longer exist. Additionally, the intense heat and brightness of the Sun's end-of-life phase will make it impossible to observe from Earth. Scientists can only study and make predictions about the Sun's end-of-life density through advanced telescopes and mathematical models.

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