How Many Earth Would Fit In The Sun?

by | Jul 9, 2024 | Glossary and FAQs

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The immense enormity of the universe frequently perplexes the human mind, and even within our solar system, the vast disparities in size between celestial bodies are astounding. Among these, the Sun and Earth provide an especially striking comparison. Understanding how many Earths may fit within the Sun necessitates going into the fundamentals of their dimensions, mass, and volume, highlighting how many Earth would fit in the Sun.

Dimensions of Earth and Sun

To understand how many Earth would fit in the Sun, we must first consider the basic measurements of both heavenly bodies:


  • Radius: About 6,371 km (3,963 miles at the centre).
  • Diameter: Approximately 12,742 km (7,926 miles)
  • Volume is approximately 1 trillion cubic kilometres (1.08321 × 10^12 km³).


  • Radius: Approximately (696,340 km 432,450 miles).
  • Diameter: Approximately 1.39 million km (864,938 miles).
  • Volume is approximately 1.41 trillion cubic kilometres (1.41 × 10^18 km³).

Calculate the Volume Ratio

We must compare their volumes to determine how many Earths would fit in the Sun. The math is straightforward: divide the volume of the Sun by the volume of the Earth.

How many Earth would fit in the Sun?

Using the figures provided:

  • Number of Earths=Volume of the Sun/Volume of the Earth
  • Number of Earths =1.41×1018 km3 / 1.08321×1012 km3
  • Number of Earths≈1.3×106

This suggests that around 1.3 million Earths might fit inside the Sun. However, this computation considers volume and ignores any actual packing inefficiencies.

Sphere Packing Considerations

Fitting spherical objects into another sphere is complicated because of the empty spaces (interstices) between the packed spheres. The most efficient approach to pack spheres is “close-packing,” with a packing density of approximately 74%. As a result, the number of Earths that could fit into the Sun would be slightly lower than the volume-based calculation indicates.

Applying packing efficiency:

Adjusted Number of Earths≈1.3×106×0.74≈962,000

Therefore, considering realistic packing, around 962,000 Earths could fit into the Sun.

Also Read: Is The Earth Circumference Shrinking Or Expanding?

Comparative Masses

While volume gives us an understanding of size, the mass comparison further emphasizes the Sun’s dominance. The Earth’s mass is approximately 5.97 × 10^24 kilograms, whereas the Sun’s mass is around 1.989 × 10^30 kilograms.

This gives a ratio: Mass of the Sun/Mass of the Earth≈333,000

Thus, the Sun’s mass is about 333,000 times that of the Earth, highlighting that the Sun is not only larger in volume but also significantly denser in terms of mass.

Implications of the Sun’s Size

The Sun’s enormous magnitude is important for various reasons.

  • Gravitational Influence: The Sun’s immense gravity binds the solar system, causing planets, asteroids, and comets to orbit.
  • Energy Production: Its massive volume and mass allow nuclear fusion reactions in its core, generating energy that powers life on Earth.
  • Life Support: The Sun’s magnitude and energy output drive Earth’s climate and weather systems, which support ecosystems and human civilization.

The Sun has a roughly 864,938-mile diameter, significantly larger than Earth’s diameter of approximately 7,926 miles. Because of this massive size discrepancy, if the Sun were hollow, it could accommodate around 1.3 million Earths. This comparison emphasizes the Sun’s enormous size in our solar system and its significance as the primary gravitational force that holds the system together. The Sun’s enormous volume and mass drive the nuclear fusion processes that generate the energy and light required for life on Earth. Understanding this contrast highlights our star’s vast scale and power.

In conclusion, the contrast between the Earth and the Sun highlights the vast size of our solar system. Based only on volume, around 1.3 million Earths could fit inside the Sun, but with actual packing, this figure would be closer to 962,000. This massive gap in size and mass emphasizes the Sun’s critical significance in our solar system, supplying the gravitational anchor and energy required for life on Earth. The Sun’s grandeur reminds us of the immense scales at work in our universe, providing a humbling perspective on our place within it.

Also Read: Climate Change In The Polar Region Of Earth



  • Dr. Emily Greenfield

    Dr. Emily Greenfield is a highly accomplished environmentalist with over 30 years of experience in writing, reviewing, and publishing content on various environmental topics. Hailing from the United States, she has dedicated her career to raising awareness about environmental issues and promoting sustainable practices.

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