nebula,cluster,globular cluster,galaxy,supercluster哪个范围大,定义是
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nebula,cluster,globular cluster,galaxy,supercluster哪个范围大,定义是什么?特点~
![nebula,cluster,globular cluster,galaxy,supercluster哪个范围大,定义是](/uploads/image/z/18994886-62-6.jpg?t=nebula%2Ccluster%2Cglobular+cluster%2Cgalaxy%2Csupercluster%E5%93%AA%E4%B8%AA%E8%8C%83%E5%9B%B4%E5%A4%A7%2C%E5%AE%9A%E4%B9%89%E6%98%AF)
nebula:a cloud of gas or dust in space
cluster:a group of similar things that are close together, sometimes surrounding something
globular cluster:old stars in the outer regions of a galaxy
galaxy:one of the independent groups of stars in the universe
supercluster:large groups of smaller galaxy groups and clusters
cluster:a group of similar things that are close together, sometimes surrounding something
globular cluster:old stars in the outer regions of a galaxy
galaxy:one of the independent groups of stars in the universe
supercluster:large groups of smaller galaxy groups and clusters