It is made up of precious alkaline metals like platinum, diamond, and more because of the heat and pressure, forming these.
j.w. dobereiner is the answer
calcium,barium,strontium and sulfur, sellenium, tellerium were noted by the german chemist j.w. döbereiner between 1817 and 1829.
Due to dispersion of light...
the inner core is this a solid liquid or gas...