imagine a hypothetical star composed of gluon stars, color neutral on whole, consisting solely of gravitationally bound glueballs. what would be its expected physics ? i.e for the mass of the sun, what would its radius be? would it emit radiation and if so what spectrum? would it be stable or would it explode or collapse into a black hole? gravity compresses the glueball. would the gluons create degenerate pressure to counteract gravity? the reason for this are suggestions of quantum gravity-qcd squared descriptions.