According to the Nebular Hypothesis, 4 - 5 millions years ago there were cloud dust and gas that positioned around the current solar system location. Their composition material were 99% hydrogen and helium plus all natural occurring element. The gravity initiated a collapse in the cloud caused the cloud to spin rapidly. That spinning process resulted a disk shape with rounded middles and flat edges. Further more it will create small objects that is called planetesimals. These planetesimals collided and captured and forming bigger objects that formed planets. While smaller part of the dust and gas created planets, 99% of it was forming a Sun. The Sun became a star and began to radiate the light and heat.
The lecture shows that by using a high speed computer we are able to do experiment and simulation of that Nebular Hypothesis. By doing the experiment we are now able to understand how stars were born. That experiment based on the information we can find in the passage that stars were formed because of the gravity pull. Another interesting conclusion we can draw is if we do the math some stars form a solar systems and sometimes it can support life.
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