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'Crumb trails' of meteoroids could reveal potential 'planet-killer' comets years before they reach Earth

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Long-period comets that rarely swing past the sun could ram into our planet.

A new study suggests we could spot these comets using the "crumb"-like meteoroid trails they leave behind.

These trails can reveal the comet's speed and direction of travel, allowing scientists to extrapolate the streams and discover the parent comets.

The Legacy Survey of Space and Time (LSST) will use the forthcoming Rubin Observatory's supervision.