"We'd have to do some more analysis, but it's probably bronze," she says. "Also we think it was possibly gilded, which would be a coating of gold over the top."
The ISS does have its own defenses, of course. Fabric-y buffers envelope some of the systems, and a bumper called the Whipple Shield helps blunt impact. That shield is only built to stop debris up to about 1 cubic centimeter, though, and the debris tracker is only designed to catch pieces 10 cubic centimeters and larger. In other words, there’s a gap in defenses.，推荐阅读服务器推荐获取更多信息
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This is quick because it's operating on a very small, localized part of the map.