Cosmos Test Review (Galaxies, Life Cycle of a Star, H-R Diagram)

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What is the life cycle of a star?

Back

The life cycle of a star includes stages such as nebula, main sequence, red giant or supergiant, and finally, either a supernova, neutron star, or black hole, depending on the star's mass.

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What is a Red Giant?

Back

A Red Giant is a late stage in a star's life cycle when it has exhausted its hydrogen fuel and expands significantly, becoming cooler and redder.

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What determines a star's life cycle?

Back

A star's life cycle is primarily determined by its mass.

Front

What is the H-R Diagram?

Back

The Hertzsprung-Russell (H-R) Diagram is a scatter plot of stars showing the relationship between their absolute magnitudes or luminosities versus their stellar classifications or effective temperatures.

Front

What happens to a star when it runs out of hydrogen fuel?

Back

When a star runs out of hydrogen fuel, it expands into a Red Giant or Supergiant.

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What is the Milky Way galaxy?

Back

The Milky Way galaxy is a barred spiral galaxy that contains our solar system and is characterized by its spiral arms.

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What is a Supernova?

Back

A Supernova is a powerful and luminous explosion that occurs at the end of a star's life cycle, often resulting in the formation of a neutron star or black hole.

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What is a Black Hole?

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A Black Hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape from it.

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What is a Pulsar Star?

Back

A Pulsar Star is a highly magnetized rotating neutron star that emits beams of electromagnetic radiation out of its magnetic poles.

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What is Polaris?

Back

Polaris, also known as the North Star, is a star located nearly at the north celestial pole and is known for its brightness and position.