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When astronomers first began to use x-ray telescopes and cameras they discovered there were objects emitting x-rays in many parts of the sky. What kinds

When astronomers first began to use x-ray telescopes and cameras they discovered there were objects emitting x-rays in many parts of the sky. What kinds of objects will emit x-rays? Group of answer choices white dwarfs planetary nebulae planets accretion disks around black holes cold neutral hydrogen gas clouds

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