It was great, so easy.

jupiter is mainly composed of hydrogen and helium just like a star. spectral analysis of jupiter has revealed that in addition to hydrogen and helium, the planet is made of water, methane and ammonia. those elements are in trace amounts. the core of the planet is thought to contain some rock and metallic hydrogen. i hope this will give you the answer to your question! : d

because the early people found out about it.

answer; pentagon papers, vietnam draft-resistor, james dean, american revolution;

answer; participant observation method;