SOLAR SYSTEM

UNIVERSE

SOLAR SYSTEM FORMATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
About 4.6 billion years ago, a cloud of stellar dust or nebula exists within the Milky Way. What happened next?
A
Shock waves hit the nebula causing it to collapse.
B
The energy enriched nebula begins to contract further due to gravity.
C
Supernova of a nearby star occurs.
D
None of the above
Explanation: 

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: -The dust and gases in a nebula are very spread out, but gravity can slowly begin to pull together clumps of dust and gas. As these clumps get bigger and bigger, their gravity gets stronger and stronger. Eventually, the clump of dust and gas gets so big that it collapses from its own gravity.

Detailed explanation-3: -The nebular hypothesis is the idea that a spinning cloud of dust made of mostly light elements, called a nebula, flattened into a protoplanetary disk, and became a solar system consisting of a star with orbiting planets [12].

Detailed explanation-4: -The nebular theory states that our solar system formed from the gravitational collapse of a giant interstellar gas cloud-the solar nebula. – (Nebula is the Latin word for cloud.) Kant and Laplace proposed the nebular hypothesis over two centuries ago. A large amount of evidence now supports this idea.

Detailed explanation-5: -nebula, (Latin: “mist” or “cloud”) plural nebulae or nebulas, any of the various tenuous clouds of gas and dust that occur in interstellar space. The term was formerly applied to any object outside the solar system that had a diffuse appearance rather than a pointlike image, as in the case of a star.

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