Calculations behind the “How LONG is the Earth” video:

Galaxy length earth: Earth’s volume is approx 10^21 cubic metres. The diameter of the galaxy is estimated at around 100,000 light years, which approximately = 10^21 metres. Hence, the earth disassembled and rearranged into a single line of 1m sided cubes stretches across the galaxy.

Observable universe length Earth: Assuming observable universe of approx 90 billion light years diameter = 8.5×10^26 metres (D) and Volume V of Earth of 10^21 cubic metres, then size of cubes required is:

X = √(V/D) = 1.12 mm

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