How fast is space expanding? Does the rate of expansion have any direct effect on the Earth or our galaxy?
The rate of expansion of space is increasing this has no direct physical effect on the Earth or out galaxy.
The increasing rate of expansion will ultimately cause the heat death of the universe. As the universe expands the level of useable energy and matter will decrease (entropy will increase) Eventually there will be no useable energy or matter in the universe. This includes the earth and our galaxy, however there is no immediate physical effect on the earth.
However there is a mental philosophical impact. The philosophy that matter is eternal and self existent should have died with the discovery of the increasing rate of expansion of the universe. ie The previous idea that the universe would recycle between periods of expansion and contraction, ( Big Bang, and Big Crush) was proven false.
Philosophies of Science are still adjusting to the concepts that the universe is not eternal, the universe is an open system, and there might be something that exists besides matter and energy.
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Since local gravitational forces oppose the effects of space expansion on small scales, the rate of space expansion is measured by the Hubble constant, which is currently estimated to be approximately 73.3 km/s per megaparsec. On cosmic scales, however, the expansion has an impact on the large-scale structure and ultimate destiny of the universe.
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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.
- What is electromagnetic radiation used for?
- What is meant by electromagnetic radiation?
- What is the second closest galaxy to the Milky Way?
- How can scientists estimate the size of the universe if it is expanding?
- If some galaxies in the local group exhibit blueshift spectral lines, why aren't these blueshifts violations of the Hubble's law?

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