Stars: Stellar Evolution
The Milky Way galaxy contains several hundred billion stars of various ages, sizes and masses. A star forms when a dense cloud of gas collapses until nuclear reactions begin deep in the interior of the cloud and provide enough energy to halt the collapse
Stellar evolution is the process by which a star undergoes a sequence of radical changes during its lifetime. Depending on the mass of the star, this lifetime ranges from only a few million years (for the most massive) to trillions of years (for the least massive), considerably more than the age of the universe. LEARN MORE »
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Sun: Death
Introduction Once our Sun began to produce energy in its core by fusing hydrogen into helium, it embarked on a long 'middle age.' As the nuclear fires became more efficient, the infant Sun...
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Interactive Tour: Stellar Evolution
The Milky Way galaxy contains several hundred billion stars of various ages, sizes and masses. A star forms when a dense cloud of gas collapses until nuclear reactions begin deep in the interior of the cloud and provide enough energy to halt the...
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Introduction Once our sun began to produce energy in its core by fusing hydrogen into helium, it embarked on a...
Introduction In 1906, Karl Schwarzschild published a fundamental paper in astronomy, describing the appearanc...
Stellar evolution is the process by which a star undergoes a sequence of radical changes during its lifetime. ...
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