HR Diagram/ Components of The Universe 8.9A

Front

What is the HR Diagram?

Back

The HR Diagram (Hertzsprung-Russell 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 are the main components of the universe?

Back

The main components of the universe include galaxies, stars, planets, nebulae, and dark matter.

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What is a galaxy?

Back

A galaxy is a massive system that consists of stars, stellar remnants, interstellar gas, dust, and dark matter, bound together by gravity.

Front

What are the types of galaxies?

Back

The main types of galaxies are spiral galaxies, elliptical galaxies, and irregular galaxies.

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What holds a galaxy together?

Back

Gravity holds a galaxy together.

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What is a nebula?

Back

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

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What is the difference between a star and a planet?

Back

A star is a luminous celestial body made of plasma that generates energy through nuclear fusion, while a planet is a celestial body that orbits a star and does not produce its own light.

Front

What is the order of components in the universe from smallest to largest?

Back

Planets, stars, nebulae, galaxies.

Front

What is the significance of the color of a star?

Back

The color of a star indicates its temperature; hotter stars appear blue or white, while cooler stars appear red or orange.

Front

What is the main characteristic used to classify galaxies?

Back

Galaxies are classified according to their shape.