Question: Is there any difference between antimatter, dark matter, dark energy, and degenerate matter?

Dominic Doyle answered on 8 Mar 2017:

Yes, they are all different from each other.
Antimatter is made from subatomic particles with opposite charge.
So the electron and positron are an antimatter pair, for example

Dark matter – we actually do not know what this is yet!
ESA is building a new space telescope called Euclid to try and measure this.
http://www.esa.int/Our_Activities/Space_Science/Euclid_dark_Universe_mission_ready_to_take_shape

Dark energy – is a type of force field – again which we do not yet fully understand.

Degenerate matter – Is an exotic form of matter found in the core of Neutron stars of large planets such as Jupiter. It’s where the atoms (e.g. Hydrogen) or sub atomic particles (Neutrons) are so closely packed together that the pressure is dominated by quantum mechanical effects and not just temperature.
http://www.wisegeek.com/what-is-degenerate-matter.htm