黑洞hēidòngTop 15000Meanings1. (astronomy) black holeCharacters used黑black洞caveExamples2大多数dàduōshù大dà星xīng系xì的de中心zhōngxīn都dōu有yǒu一个yīge超chāo大dà质量zhìliàng黑洞hēidòng。Most large galaxies have a central supermassive black hole.黑洞hēidòng存在cúnzài吗ma？Do black holes exist?