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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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LaoA protosun is an early-stage version of a star before it has fully formed and ignited nuclear fusion in its core. It is composed mainly of gas and dust, undergoing gravitational collapse as it accumulates mass from its surrounding nebula. Over time, the protosun will eventually reach a critical mass and temperature to initiate nuclear fusion, becoming a fully functional star.
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What name is given to the concentration of mass that formed at the center of the solar nebula and eventually became the Sun?
The name given to the concentration of mass at the center of the solar nebula that eventually formed the Sun is the protosun or solar protostar. This dense core accumulated gas and dust, triggering nuclear fusion to ignite as a star.
What theory suggests that protoplanets began to form around the protosun from many collisions and combinations of gas and matter called what?
The nebular hypothesis proposes that protoplanets formed around the protosun in a protoplanetary disk through collisions and aggregations of gas and dust. This process, known as accretion, led to the formation of larger bodies from smaller ones over time.
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