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单词
Ring Nebula
释义
Ring Nebula
Encyclopedia
理学
行星状星云
释
Ring Nebula
环状星云
位于天琴座的典型的行星状星云。星表中的编号为M57和NGC6720。位于北天区,距离地球2300光年,目视星等8.8,半径约1.3光年。由于面向地球呈环状结构,并处于明亮的织女星以南,长期以来备受关注。
Astronomy
Ring Nebula
指环星云
随便看
heterocyclic amines
heterocyclic boron compound
heterocyclic cationic surfactant
heterocyclic compound
heterocyclic compounds poisoning
heterocyclic perfume
heterocyclic pigment
heterocyclic polymer
heterocyclization
heterocyst
heterodesmic
heterodesmic structure
heterodichogamy
hetero Diels Alder reaction
hetero-Diels-Alder reaction
heterodimensional cycle
heterodiode
heterodisperse
heterodont
heteroduplex
heteroduplex analysis,HA
heterodyne
heterodyne detection
heterodyne detector
heterodyne hologram
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更新时间:2026/8/1 8:53:52