GENERAL KNOWLEDGE

GK

THE UNIVERSE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
an interstellar cloud of dust, hydrogen, helium, and other ionized gases.
A
Galaxy
B
Nebula
C
Star
D
Planet
Explanation: 

Detailed explanation-1: -A nebula is an interstellar cloud of dust and other ionized gases resulting from the explosion of a star. Nebulae are clouds made up mainly of hydrogen gas and dust particles.

Detailed explanation-2: -What is an interstellar cloud made of? Interstellar clouds are made up of mostly hydrogen and helium gas, but also dust and plasma. They can vary in density, temperature, and size.

Detailed explanation-3: -Most interstellar gas is hydrogen and helium. Interstellar dust accounts for about 1% of the interstellar material and is a combination of carbon (graphite) and silicates (similar to sand in composition).

Detailed explanation-4: -The region between the stars contains interstellar clouds composed primarily of dust and gas. Over 100 molecules (neutrals, ions, and radicals), mostly carbon-containing compounds, have been identified in interstellar molecular clouds.

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