HyperDic: oort_cloud

English > 1 sense of the expression Oort cloud:
NOUNgroupOort cloud(astronomy) a hypothetical huge collection of comets orbiting the sun far beyond the orbit of Pluto
English > Oort cloud: 1 sense > noun 1, group
Meaning(astronomy) a hypothetical huge collection of comets orbiting the sun far beyond the orbit of Pluto; perturbations (as by other stars) can upset a comet's orbit and may send it tumbling toward the sun.
Categoryastronomy, uranologyThe branch of physics that studies celestial bodies and the universe as a whole
Broadercollection, aggregation, accumulation, assemblageSeveral things grouped together or considered as a whole

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