'Main sequence phase' diaporamas de présentation

Unit 5

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a. 1/3 year; b. 9 years; c. 3 years; d. none of the above

If the Sun were 9 times more heavier than it is, while the Earth were still 1 A.U. (Astronomical Unit) away from it, the Earth year would be:. a. 1/3 year; b. 9 years; c. 3 years; d. none of the above. How is the distance to a star related to its parallax?.

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STELLAR EVOLUTION

Stellar evolution is driven entirely by the never ending battle between pressure and gravity. As imbalances are reached, the star is driven to find a new energy source. Each stage in stellar evolution is marked by a different energy generation mechanism. STELLAR EVOLUTION. ? HR Diagram

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The Life Cycle of a Star

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Stars

Stars. What is a star?. The objects that heat and light the planets in a system A star is a ball of plasma held together by its own gravity Nuclear reactions occur in stars (H ? He) Energy from the nuclear reactions is released as electromagnetic radiation. Characteristics of Stars.

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Stars

Stars What is a star? The objects that heat and light the planets in a system A star is a ball of plasma held together by its own gravity Nuclear reactions occur in stars (H ? He) Energy from the nuclear reactions is released as electromagnetic radiation Characteristics of Stars DISTANCE

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Stars

Stars. What is a star?. The objects that heat and light the planets in a system A star is a ball of plasma held together by its own gravity Nuclear reactions occur in stars (H ? He) Energy from the nuclear reactions is released as electromagnetic radiation. Characteristics of Stars.

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Stars

Stars. What is a star?. The objects that heat and light the planets in a system A star is a ball of plasma held together by its own gravity Nuclear reactions occur in stars (H ? He) Energy from the nuclear reactions is released as electromagnetic radiation. Characteristics of Stars.

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Stars

Stars. What is a STAR ?. The objects that heat and light the planets in a system A star is a ball of plasma held together by its own gravity Nuclear reactions occur in stars (H ? He) Energy from the nuclear reactions is released as electromagnetic radiation. A. Characteristics of Stars.

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1.3. Treatment of the mass transfer episodes

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