pro·to·plan·e·tar·y disk 
(prō′tō-plănĭ-tĕr′ē)
(prō′tō-plănĭ-tĕr′ē)n.
A disk of gas and dust, often geometrically thin and opaque, orbiting a newly formed star, from which planets may eventually form.
| 单词 | protoplanetary disk |
| 释义 | pro·to·plan·e·tar·y disk (prō′tō-plănĭ-tĕr′ē)n. A disk of gas and dust, often geometrically thin and opaque, orbiting a newly formed star, from which planets may eventually form. |
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