3 ms·
The term "Dark Matter" refers to an unknown kind of matter that interacts gravitationally but not electromagnetically. My comment is referring to cool baryonic
by tynpeddler 5y ago
The term "Dark Matter" refers to an unknown kind of matter that interacts gravitationally but not electromagnetically. My comment is referring to cool baryonic matter, ie the same kind of matter than you and I are made of.
In other words, MOND explains galaxy dynamics by modifying gravity and postulating the existence of small amounts of conventional matter that are below the detection threshold of our telescopes.
Dark matter theories explain galaxy dynamics by postulating the existence of huge amounts of an exotic matter (alongside some conventional dust) that we can't see and haven't been able to detect in any experiments.