Practically side-by-side in time, discovered in separate observations made as part of the Sloan Digital Sky Survey, are compact but bright objects known as quasars.
实际上与此同时，在索隆的数字天空测量的分离观测部分里，这种紧凑但是明亮的物体已经被发现，并被认知为类星体。
Practically side-by-side in time, discovered in separate observations made as part of the Sloan Digital Sky Survey, are compact but bright objects known as quasars.
实际上与此同时，在索隆的数字天空测量的分离观测部分里，这种紧凑但是明亮的物体已经被发现，并被认知为类星体。
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