8 Topic 4: The Universe

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What is Redshift?

Back

Redshift is the phenomenon where light from an object moving away from us shifts to longer wavelengths, making it appear redder.

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What is Blueshift?

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Blueshift is the phenomenon where light from an object moving toward us shifts to shorter wavelengths, making it appear bluer.

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What is a Protostar?

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A protostar is a stage in a star's life cycle that forms right after a nebula containing gas and dust collapses.

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What determines the life cycle of a star?

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The primary factor that determines the life cycle of a star is its mass.

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What does the Big Bang Theory explain?

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The Big Bang Theory explains how the universe was formed from a singularity and has been expanding ever since.

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What is a Spiral Galaxy?

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A spiral galaxy is characterized by a concentrated bulge of matter in the middle and arms that spiral outward.

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What is a Nebula?

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A nebula is a large cloud of gas and dust in space, often the birthplace of stars.

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What is a Supernova?

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A supernova is a powerful 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 Main Sequence Star?

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A main sequence star is a stable phase in a star's life cycle where it fuses hydrogen into helium in its core.

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What is the difference between a Red Giant and a White Dwarf?

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A red giant is a late stage in a star's life when it expands and cools, while a white dwarf is the remnant core left after a star has shed its outer layers.