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Explain why the Bullet Cluster is considered a strong example for the existence of dark matter, based on the figure below. Explain why the Bullet Cluster is considered a strong example for the existence of dark matter, based on the figure below.

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The Bullet Cluster represents the collis...

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The first stars formed in the universe had ________ compared with the stars formed today.


A) higher heavy-element content and higher mass
B) higher heavy-element content and lower mass
C) lower heavy-element content and higher mass
D) lower heavy-element content and lower mass
E) higher mass and longer lifetimes

F) A) and C)
G) A) and D)

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Describe two ways in which you could measure the mass of a galaxy cluster.

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Here are three possible answers.1)Determ...

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