Chapter 1

The anatomy of an octillion

Chapter 2

The octillion in your mirror

Chapter 3

Cosmic scales and starry numbers

YOUR GOAL

Master of Five octillion reasons to love big numbers

Ch 1 · The anatomy of an octillion
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anadmin1988 The metric system officially adopts ronna and ronto for extreme measurements.

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anadmin1988 Anatomy of an Octillion

Give me twenty-seven zeros in a row (in a row!) / Five octillion grams is the Earth below (down below!)

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anadmin1988 The mathematical representation of five octillion

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Welcome to the ronna era

anadmin1988 In 2022, international scientists officially introduced the prefix ronna to represent the scale of an octillion.

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The great divide of named numbers

anadmin1988 An octillion means vastly different things depending on whether you are using the short-scale or long-scale system.

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Meet Five Octillion
BETA

anadmin1988 Swipe through cosmic objects to discover the mind-boggling scale of five octillion.

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Fun Fact

Naming the cosmos: In 2010, a physics student at UC Davis jokingly petitioned to name the 10 to the 27th prefix 'hella', which would make the universe's diameter 1.4 hellameters.

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Gossip

Which scale system makes more intuitive sense to you?

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Quiz

In the historical European long-scale system, what power of ten did an octillion represent?

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anadmin1988 The mathematical reality of counting past the age of the universe.

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Quiz

If you count one number per second, how long would it take to count to 5 octillion?

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Quiz

What does the prefix 'octo-' represent in the short-scale number octillion?

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Quiz

How many zeros are in the number 5 octillion when written in the short scale?

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Quiz

What is the correct scientific notation for the number 5 octillion?

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Quiz

Why did measurement scientists expand the SI prefixes to include 'ronna' in 2022?

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Quiz

Which metric prefix was officially adopted in 2022 to represent 10 to the 27th power?

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Quiz

In the math formula for the short-scale system, what determines the number of zeros?

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