Low Mass Stars

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What is a low mass star?

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A low mass star is a star with a mass less than about 2 times the mass of the Sun. They have longer lifespans and evolve more slowly than high mass stars.

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What is a high mass star?

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A high mass star is a star with a mass greater than about 8 times the mass of the Sun. They have shorter lifespans and undergo more dramatic evolutionary changes.

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How does the mass of a star affect its lifespan?

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Generally, the lower the mass of a star, the longer it lives. Low mass stars can live for billions of years, while high mass stars may only last a few million years.

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What happens to the Sun as it ages?

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As the Sun ages, it increases in luminosity and expands, eventually becoming a red giant.

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What is luminosity?

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Luminosity is the total amount of energy emitted by a star per unit time, often measured in watts.

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What is the relationship between a star's mass and its ability to fuse elements?

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A star needs a certain mass to create the pressure and temperature necessary to fuse elements like carbon. For carbon fusion, a mass of about 8 times the Sun's mass is required.

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What is the fate of the Earth as the Sun expands?

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As the Sun expands into a red giant, the Earth will move out into a bigger orbit due to the loss of the Sun's mass.

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What is the significance of a star's apparent magnitude?

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Apparent magnitude measures how bright a star appears from Earth, which can be affected by distance and intrinsic luminosity.

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What is the difference between a dwarf star and a giant star?

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Dwarf stars are smaller and less luminous than giant stars, which are larger and more luminous.

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What is a red giant?

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A red giant is a late stage in the life cycle of a star, characterized by a large radius and a reddish color due to cooler surface temperatures.