current theories predict that dark matter and galaxies should stay together even during violent mash ups because they are drawn to each others gravity but that hot gas will drag behind because it feels the effects of a cosmic drag that is similar to air resistance this was what scientists saw happening in the bullet cluster
目前的理论预测，暗物质和星系即使在剧烈的碰撞中也应该保持在一起，因为它们相互吸引，但热气体会拖在后面，因为它感受到类似于空气阻力的宇宙阻力的影响，这就是科学家们在子弹星团中看到的情况
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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