Sentences with phrase «invisible outer region»
Such a disk could cause the long - term dimming of Boyajian's star as its nearly invisible outer region, followed by its dense inner region, drifted across our line of sight during the past 100 years.
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The only way these outer regions could remain intact was if they were bound together by the gravitational embrace of a much larger halo of invisible material, five to 10 times as massive as the visible galaxy.