Why Do Galaxies Rotate So Fast….#viralvideos #shortsfeed

Why galaxies rotate so fast?
What is the reason for galaxies is rotating so fast?
Is Milky Way also rotating very fast?
What will happen if two galaxies collide?
How earth is placed in Milky Way galaxy
Is Galaxy is running so fast can be dangerous for earth?
How do we counter galaxies running so fast?

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