Size of earth compared to the observable universe
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Earth Size and Radius Compared to Observable Universe
The Earth has a radius of about 6.4 × 10^6 meters (6,400 kilometers) and a mass of approximately 6 × 10^27 grams 12. These values are well established and confirmed by various methods, including relativistic matter wave calculations and astronomical measurements .
Observable Universe Size and Scale
The observable universe is vastly larger than the Earth. Its radius is estimated to be about 46 billion light-years, which is roughly 4.4 × 10^26 meters. The age of the universe is about 13.7 billion years, and this immense size is a result of the expansion of space over cosmic time 34. Calculations using the Hubble constant and general relativity confirm these enormous distances and time scales 34.
Direct Size Comparison: Earth vs. Observable Universe
When comparing the size of the Earth to the observable universe, the difference is extreme. The Earth's radius (6.4 × 10^6 meters) is minuscule compared to the universe's radius (4.4 × 10^26 meters). This means the observable universe is about 10^20 times larger in radius than the Earth 1234. In terms of volume, the difference is even more dramatic, as volume scales with the cube of the radius.
Conclusion
The Earth is incredibly small compared to the observable universe. While the Earth’s radius is about 6,400 kilometers, the observable universe stretches across billions of light-years, making the Earth’s size negligible on a cosmic scale 1234. This vast difference highlights the immense scale of the universe relative to our planet.
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