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WordNet ÀÏ¹Ý ¿µ¿µ »çÀü °Ë»ö °á°ú : 2 ÆäÀÌÁö: 1
OOR Dutch astronomer who proved that the galaxy is rotating and proposed the existence of the Oort cloud (1900-1992)
OOR (astronomy) a hypothetical huge collection of comets orbiting the sun far beyond the orbit of Pluto
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