What will happen if you travel in a straight line in our universe? Can you ever leave our universe?
This question is not easy to answer and there so many issues involved, some of which are listed below.
There are numerous issues involved in answering this question, so it is not simple.
First, what exactly does it mean to be moving in a straight line? In space, a straight line can be distorted by matter, especially massive stars and galaxies, making it extremely difficult to define.
Second, which direction to go (keep in mind that the direction itself might not be a straight line) and whether to move toward or away from celestial bodies. If we are traveling in the direction of a massive star or the galactic center, there might be problems.
Third, what is our velocity of motion? There are escape velocities for departing from Earth, our solar system, and other nearby celestial bodies and clusters.
Most importantly, we might not be able to travel very far because the universe is probably infinite and our resources for doing so are limited.
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Because space is curved, even if you traveled in a straight line within our observable universe, you would eventually end up back where you started. From what we currently know, it is not possible to exit our universe because it is comprised entirely of spacetime.
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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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