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How far is a light-year? Your astronomy lessons will blow your mind even more when you understand the… | Amazing science facts, Earth and space science, Space facts
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![Objective 1 Compare the size and distance of objects within systems in the universe. Use the speed of light as a measuring standard to describe the. - ppt download Objective 1 Compare the size and distance of objects within systems in the universe. Use the speed of light as a measuring standard to describe the. - ppt download](https://images.slideplayer.com/19/5894328/slides/slide_20.jpg)
Objective 1 Compare the size and distance of objects within systems in the universe. Use the speed of light as a measuring standard to describe the. - ppt download
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