单词ring-galaxy
网络: 环星系；环状星系
How Hoag"s Object formed remains unknown, although similar objects have been identified and collectively labeled as a form of ring galaxy.
我们还不知道霍格发现的这个东西是如何形成的。以往有相似的星系被鉴定出来，并都被归类为环形星系的一种类型。
Coincidentally, visible in the gap (at about one o"clock) is yet another ring galaxy that likely lies far in the distance.
请注意在黑暗间隙大约1点钟指针方向的位置有另一个环形星系，它可能位于离我们更远的位置上。
Over 20 million light-years away, its peculiar appearance marks it as a polar ring galaxy.
它距我们超过2千万光年之远，其独特的外形给它带来了极环星系的名字。
Coincidentally, visible in the gap is yet another ring galaxy that likely lies far in the distance.
凑巧的是，从这条缝隙里看过去，还能看见另一个更加遥远的环星系。