GK
BIG BANG THEORY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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100% hydrogen
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50% hydrogen
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75% hydrogen and 25% helium
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Mostly helium
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Detailed explanation-1: -The interstellar medium is composed, primarily, of hydrogen, followed by helium with trace amounts of carbon, oxygen, and nitrogen. The thermal pressures of these phases are in rough equilibrium with one another.
Detailed explanation-2: -In a nutshell, the interstellar medium is the material that fills the space between stars. 99% of the interstellar medium is made up of (mostly hydrogen) gas and the rest is composed of dust. The interstellar medium is vast and expansive in size but very, very low in density.
Detailed explanation-3: -The interstellar medium is filled primarily with hydrogen gas. A relatively significant amount of helium has also been detected, along with smaller percentages of such substances as calcium, sodium, water, ammonia, and formaldehyde.