Which Event Marks the Birth of a Star?

Answer

The event that marks the birth of a star is the ignition of the hydrogen at the center of a dense cloud of gas when it reaches 20 million degrees Fahrenheit. The burning of the hydrogen causes a series of nuclear reactions at the stars center. It is this series of events that ultimately marks the birth of a star.
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Q&A Related to "Which Event Marks the Birth of a Star?"
fusion of hydrogen atoms into helium atoms
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Star is a product of explosion of galaxies. Like in quasars and big bang theory. For more info, you can download Natonal Geographic film in torrent.
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As a foreigner (albeit one fascinated by US history who has lived here a lot) can I give a wholly different answer ? None. Because the. whole point. of the American psyche is re-invention
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Hydrogen within a star ignites & burns in a continuing series of nuclear
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