What keeps galactic clusters together?
Gravity (the attraction force between 2 or more objects with mass)
Because the universe is expanding faster than light, the distance between all celestial bodies is getting longer. In our galaxy, gravity is keeping us together because it is stronger than the force that is pushing us apart, which means we stay in our galaxy. This is also true for our galactic cluster because our cluster is massive enough that gravity is keeping us together because it is stronger than the dark energy that is pushing us apart.
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Galactic clusters are held together primarily by gravity. The gravitational force between the individual galaxies within the cluster, as well as the dark matter that makes up a significant portion of the cluster's mass, binds the galaxies together.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
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