3 years ago

Which characteristics describe a spiral galaxy?

1 answer:

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Answer: Most spiral galaxies consist of a flat, rotating disk containing stars, gas and dust, and a central concentration of stars known as the bulge.

Explanation:

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The greenhouse and enhanced greenhouse effects refer to the return of approximately 80 percent and greater than 80 percent of the heat radiated by Earth.

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During natural greenhouse effect :

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While during Human Enhanced Greenhouse effect :

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Hence the enhanced greenhouse effect refers to return of more than 80% of heat radiated by Earth .

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