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Orbit2.gif(200 × 200 pixels, file size: 27 KB, MIME type: image/gif, looped, 40 frames, 3.2 s)
English: Two bodies with a slight difference in mass orbiting around a common barycenter (red cross) with circular orbits.
Polski: Dwa ciała o zbliżonych masach krążące wokół wspólnego barycentrum (np. Pluton i Charon)
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Author User:Zhatt
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