GK
SOLAR SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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When fusion started in the Sun
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When it started glowing.
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After the outer planets formed.
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After the inner planets formed.
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Detailed explanation-1: -Approximately 4.6 billion years ago, the solar system was a cloud of dust and gas known as a solar nebula. Gravity collapsed the material in on itself as it began to spin, forming the sun in the center of the nebula. With the rise of the sun, the remaining material began to clump together.
Detailed explanation-2: -This is known as a planetary nebula-an expanding shell of hot gas that streams across the solar system after it is expelled from a star (the nebula itself is essentially the outer layers of the star). After it expels its outer layers, the core of the Sun will contract, and it will become a white dwarf.
Detailed explanation-3: -Copernicus finished the first manuscript of his book, “De Revolutionibus Orbium Coelestium” ("On the Revolutions of the Heavenly Spheres (opens in new tab)") in 1532. In it, Copernicus established that the planets orbited the sun rather than the Earth.