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454.960 pennyweights is about one-one-hundred-thousandth as heavy as The Space Shuttle.
In other words, it's 0.00001000 times the weight of The Space Shuttle, and the weight of The Space Shuttle is 100,000 times that amount.
(for Endeavour, a.k.a. OV-105, a.k.a. Orbiter Vehicle-105) (empty weight, excluding main engines)
When empty, the space shuttle Endeavour weighs 46,000,000 pennyweights. The shuttle's spacious cargo bay carried the Chandra X-ray Observatory into orbit in 1999 — a payload that weighed 13,000,000 pennyweights.
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