Does the Sun have any hard substances, or is it just gas?

 This question is a bit tricky, but let me give it a try. The Sun’s core (its hottest part, where thermo-nuclear fusion occurs) extends to 20-25% of the solar radius. Now, because of the huge gravity compression, the core has a density of 

∼150g/cm3${\mathrm{<span\; style="background-color:\; initial;\; font-family:\; -apple-system,\; system-ui,\; BlinkMacSystemFont,\; "Segoe\; UI",\; Roboto,\; Oxygen-Sans,\; Ubuntu,\; Cantarell,\; "Helvetica\; Neue",\; sans-serif;\; font-size:\; large;\; font-weight:\; bold;\; word-spacing:\; normal;">at\; the\; center,\; and\; a\; temperature\; of </span>}}^{}$15×106
 K. Mind you, this density is equivalent to about 7.7 that of GOLD!! However, the core is so hot that it’s not solid, but a dense ionised plasma (a gas of ions and electrons randomly moving at very high speeds).   

C- charles Bonato