If the universe is always expanding, what is causing it to do so?
Dark Energy.
It is known as the "Dark Energy" and although its exact nature is unknown, scientists estimate that it makes up roughly 68% of the universe. The Dark Energy is also responsible for the universe's increasing rate of expansion.
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The universe is expanding because of an unexplained force called dark energy, which accelerates the expansion over time by opposing the gravitational pull between matter.
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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.
- Why does light refract when it goes through a prism? How does the glass bend the light rays?
- Can you change the wavelength of light by putting a filter on it?
- Why does intergalactic space expand, but not not galaxies and solar systems themselves?
- What are divergent and convergent beams of light?
- Why is it difficult to detect planets orbiting other stars?
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