SESZIONE DI TORINO
After briefly summarizing the successes and failures of the Cold Dark Matter paradigm on galaxy scales, we present its main phenomenological contender, known as MOND (Modified Newtonian Dynamics), a paradigm devised by Milgrom in 1983, and whose successes on galaxy scales have accumulated over twenty-five years. We present an exhaustive list of these phenomenological successes, typified by laws of galactic motion analogous to Kepler's laws of planetary motion. We show that these laws are respected in galaxies whose composition is supposed to be different within the standard CDM paradigm, i.e. both in "CDM-dominated" galaxies (such as spirals) and in "non-CDM-dominated" galaxies (such as tidal dwarfs).

DATA: 11-11-2008