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Mathematics 7 Online
OpenStudy (anonymous):

The following images show the same galaxy, the Sombrero galaxy, in visible light (on the left) and in x-ray frequencies (on the right). Credit: Visible: NASA/STScI/AURA/Hubble Heritage Xray: NASA/UMass/Q.D.Wang et al. Based on the above pictures, which of the following statements must be true?

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