Quark Star
https://en.wikipedia.org/wiki/Up_quark : 1.8 to 3.0 MeV/c
https://en.wikipedia.org/wiki/Quark_star
Rachid Ouyed Saskatchewan
https://en.wikipedia.org/wiki/Up_quark : 1.8 to 3.0 MeV/c
https://en.wikipedia.org/wiki/Quark_star
Rachid Ouyed Saskatchewan