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How did Astronomers measure the size of the Milky Way Galaxy?
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lensing on "galaxy zoo"
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How do they measure the amount of water flowing over a water-fall?
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How can I measure light level or brightness level for a video project?
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Are the spiral arms of a spiral galaxy visible?
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How do I link a "Galaxy Tab 10.1" tablet to a PC via USB?
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19/02/2019 21:23:09 by Lijinae |