Abstract
Matter–antimatter asymmetry observed in our Universe is discussed with attention to different effects which are (or may be) present in the phase diagram of matter. Some implications which can possibly be present in astrophysical objects are also discussed. They may not rely on non-equilibrium conditions. For this, spontaneous (or not) symmetry breakings expected and/or envisaged to occur in the phase diagram of matter are briefly discussed and different scenarios for particular periods of the early Universe are proposed, which can also yield aspects of relevance for formation of large structures. Issues which can also be of relevance for the Hubble's Law are raised.
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