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The simple answer is: the larger units such as AU or light years are easier for the human brain to remember. And, we should avoid putting units with to many zeros trailing after the first few digits, for example:1,000,000,000,000,000,000,000,000,000,000 meters. we could use AU or ffor even higher distances, light years. If it was shorter, well we cold still use meters but with an exponent.

The simple answer is: the larger units such as AU or light years are easier for the human brain to remember. And, we should avoid putting units with to many zeros trailing after the first few digits, for example:1,000,000,000,000,000,000,000,000,000,000 meters. we could use AU or f even higher, light years. If it was shorter, well we cold still use meters but with an exponent.

The simple answer is: the larger units such as AU or light years are easier for the human brain to remember. And, we should avoid putting units with to many zeros trailing after the first few digits, for example:1,000,000,000,000,000,000,000,000,000,000 meters. we could use AU or for even higher distances, light years. If it was shorter, well we cold still use meters but with an exponent.

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source | link

The simple answer is: the larger units such as AU or light years are easier for the human brain to remember. And, we should avoid putting units with to many zeros trailing after the first few digits, for example:1,000,000,000,000,000,000,000,000,000,000 meters. we could use AU or f even higher, light years. If it was shorter, well we cold still use meters but with an exponent.