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Is 315 miligrams as heavy as The Space Shuttle?

It's about 0.000000005 times as heavy as The Space Shuttle
The weight of The Space Shuttle is about 71,000,000,000 miligrams.
(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 71,000,000,000 miligrams. The shuttle's spacious cargo bay carried the Chandra X-ray Observatory into orbit in 1999 — a payload that weighed 20,000,000,000 miligrams.
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