In these regions, space-time might be very different, and likely doesn't contain stars and galaxies (which only formed because of the particular density pattern of mass in our bubble). It could include giant, massive structures much larger than anything in our own observable universe. These structures are what researchers suspect are tugging on the galaxy clusters, causing the dark flow.
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Such a behemoth would impose a kind of "tilt" on the universe, causing matter to move in one particular direction - as observations of the dark flow suggest.
只有这样的庞然大物才会对宇宙施加某种冲刺，促使物体沿着一个特定的方向移动——正如所观察到的暗流所表示的那样。
Dark clouds flow across the sky, sometimes from different directions, sometimes blocking background starlight, but other times causing stars to appear to flare as they move in front.
云朵横穿过天空，时而来自不同的方向，时而遮蔽了星光熠熠的蓝色幕布，有时他们移到恒星的前面，忽厚忽薄的云使得星星一闪一闪的发亮。
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