comet-shaped nebula [天] 彗状星云
comet-shaped spot 慧星状斑点
comet-shaped smudge 彗状像点
comet-shaped blemish 彗状像点
Since comet tails are shaped by sunlight and the solar wind, they always point away from the sun.
由于彗尾是因为太阳光和太阳风成形的，所以彗尾一般背向太阳。
He was known as Uther Pendragon after being inspired by a dragon-shaped comet.
他因受龙形彗星的启发而以尤瑟·潘德拉贡之称闻名。
Serendipitously, the picture also recorded a bright, comet-shaped cloud not known to share the sky with Orion's famous stars and nebulae.
在不经意间，上面影像中还拍摄到了一条未知的彗星状明亮云带，与猎户座著名星云分享了这片天空。
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