Astronomers have seen stars forming within a nebular cloud. as the nebular cloud condenses and its own gravitational attraction collapses it, heat and energy build up creating nuclear fusion a planet nuclear differentiation dust and gas

Astronomers have seen stars forming within a nebular cloud. As the nebular cloud condenses and its own gravitational attraction collapses it, heat and energy build up creating a planet. It may be small planet depending on the size of the nebular cloud.

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answer; acquired mainly during early childhood;