About the same time, though, scientists realized comets might contain decaying radioactive isotopes that could have warmed cometary interiors to temperatures that caused the interiors to evolve.

然而，大约在同一时间，科学家们意识到彗星可能含有衰变的放射性同位素，这些同位素可能使彗星内部的温度升高到导致内部进化的温度。

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So the cometary dust work had to take priority.

也因此彗星尘埃的工作获得了优先。

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Energetic light from this star is eating away the dust of the dark cometary globule at the top right the image.

从这颗恒星发出的高能光线正把途中右上角的黯淡的彗星似的小球体中的尘埃消灭掉。

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As the cometary "grit" from Swift-Tuttle strikes our atmosphere, it burns up, often creating streaks of light across the sky.

BBC: Perseid meteor show reaches peak

They were all blasted off the Red Planet by some asteroid or cometary impact, and then spent millions of years travelling through space before falling to Earth.

BBC: Mars meteorite 'Black Beauty' is in a class of its own

There might be even more: the measurements probe only the top half-metre of regolith, but it is thought that cometary bombardment could have left ice in the top two metres.

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