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HubbleData.JPG (432 × 438 pixel, file size: ৪৩ KB, MIME type: image/jpeg)
[সম্পাদনা] Summary
"A Relation Between Distance and Radial Velocity Among Extra-Galactic Nebulae," Hubble, E. (1929) (c) by National Academy of Sciences - authorized terms of use at: http://www.pnas.org/misc/terms.shtml. This image is and will be used on Wikipedia for educational, non-commercial use.
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