um... hydrogen is generally combustible... and it would deffinitely be on fire on the sun. so I would consider that pretty harmful...
Hydrogen.
The Sun does not have a "crust"; the surface of the Sun is 12,000 degree-hot hydrogen plasma.
Hydrogen and helium. Mostly hydrogen.
helium and hydrogen
Hydrogen
hydrogen
At the suns and stars.
Energy can be obtained by converting hydrogen into heavier elements (nuclear fusion). Suns usually have lots of hydrogen, which was available from the early stages of the Universe.
Chromosphere
photosphere
It obsorbs the heat of the suns harmful rays.
the sun in it's entirety is made up of a majority of hydrogen and a high minority of helium, the sun is alljust a big ball of gas really