The Protosun
A protosun is a sun (star) that is still forming. It takes millions of years of solar winds and gravitational forces to gather and compress massive clouds of hydrogen to the point where it's gravity is powerful enough to cause nuclear fusion at it's core and "ignite" a new star.
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It is the same as the Dictionary definition.
what is the key difference between a protosun and the real sun?
what do the largest clumps surrounding the protosun to begin to form
Protosun
The protosun has not fully "ignited" meaning nuclear fusion is not stably providing the energy output of the star. Once ignition takes place, the central core of the sun will produce energy almost exclusively through fusion, creating enough energy and radiation to slowly wash away the nebulous gas surrounding the protosun revealing the sun itself.
The Protosun
Nebular
A protosun is a sun (star) that is still forming. It takes millions of years of solar winds and gravitational forces to gather and compress massive clouds of hydrogen to the point where it's gravity is powerful enough to cause nuclear fusion at it's core and "ignite" a new star.
Heat, derived from gravitational energy. The gravitational collapse of the original nebula of gas and dust produced very high temperatures and a "protosun". Eventually the protosun became a star (our Sun) when the nuclear fusion reactions began at temperatures of millions of degrees Celsius.
No our Sun is a fully formed Star. A Protostar is gas that is still acreeting matter (still collecting via gravtaional rotation) to form a star. And as a result they are not very bright as they have not condensed enough to start Nuclear Fusion.
AnswerA proto star hasn't accumulated enough mass for the thermo-nuclear reacton to start, which would make it a star.To add to the above answer, most of the light that a protostar produces is due to the pressure from gravity. -Phil
1) The solar nebula collapses; 2) The Spinning Nebula Flattens; 3) Condensation of Protosun and Protoplanets; 4) Massive expanding gas clouds; 5) Planetesimals collided and grew with other bodies; and 6) Nebulous clouds form.
Definition is the same as meaning.