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Adrian59
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I have been working on a discovery that could explain galaxy rotation curve without dark matter or modification of Newtonian dynamics. However, I was unable to make any comment within this forum since this was unpublished work. However, the same discovery has been made independently by Kenneth F Nicholson (astro-ph/0309762 v2) and Dilip G. Banhatti (arXiv:0806.1131v4). I found these references in an article by James T. Dwyer entitled, ‘Inappropriate Application of Kepler’s Empirical Laws of Planetary Motion to Spiral Galaxies Created the Perceived Galaxy Rotation Problem – Thereby Establishing a Galactic Presence for the Elusive, Inferred Dark Matter’, (https://www.researchgate.net/profile/James_Dwyer/publication). These two papers explain the flat or sometimes rising galaxy rotational velocities using the baryonic matter known to be present in a galaxy, thereby eliminating the need for exotic matter or any modification of known physics.