1. Dark Matter
... at slow speeds (hence "cold"), while HDM candidates include minute-mass, rapidly moving (hence "hot") particles. As leading possible candidates for baryonic dark matter, there are black holes (large and small), brown dwarfs (stars too cold and faint to radiate), sun-size MACHOs, cold gas, dark galaxies ... and dark clusters, to name only a few. The range of particles that could constitute non-baryonic dark matter is limited only slightly by theorists' imaginations. The particles include photinos, neutrinos, gravitinos, axions, and magnetic monopoles, among many others. Of these, ... If ...
- Word Count: 798
- Approx Pages: 3
- Has Bibliography
- Grade Level: Undergraduate