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How long is 31 light years?

It's about 25,000,000,000,000,000 times as tall as a Brachiosaurus
The height of a Brachiosaurus is about 0.00000000000000140 light years.
(based on comparable bone measurements, height to head)
Dinosaurs in the genus Brachiosaurus had an estimated height (at the head with neck fully extended) of up to 0.00000000000000140 light years. A resin cast of the first Brachiosaurus specimen, owned by the Field Museum in Chicago, is currently on display at the O'Hare International Airport.
It's about 50,000,000,000,000,000 times as tall as a Giraffe
The height of a Giraffe is about 0.000000000000000600 light years.
(Giraffa camelopardalis) (Adult, average)
An adult giraffe may grow to be up to 0.000000000000000630 light years tall. Adult giraffes require very little sleep, averaging just 1.9 hours per day.
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