Dark matter is a mysterious, invisible substance that acts as cosmic glue, holding our galaxy together despite its rapid rotation; it is approximately five times more massive than the visible galaxy and provides the gravitational force that prevents stars and planets from flying off into space.
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What Holds Our Galaxy Together?
Added:What is [music] dark matter?
Our galaxy spins so fast its stars [music] and planets should be thrown into space by the sheer force of its rotation.
But they are held in space by a mysterious [music] presence five times more massive than the galaxy called dark [music] matter.
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