since im short on points i will just sum up my questions
1)does our universe stretch out forever or is there a limit?
2)why does the matter in our universe get cooler and cooler as the cosmos expands?
3)is there really a planet similar to earth out there?
4) why is it that we haven't explored stars on the outermost part of the cosmos?
5) what is the reason behind the gravitational well theory?
1)does our universe stretch out forever or is there a limit?
2)why does the matter in our universe get cooler and cooler as the cosmos expands?
3)is there really a planet similar to earth out there?
4) why is it that we haven't explored stars on the outermost part of the cosmos?
5) what is the reason behind the gravitational well theory?
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1. We don't know if the total Universe is infinite. It may be in a condition called finite but unbounded, which is a sort of infinity. It is like the surface of the Earth. You can circle it an infinite number of times without repeating any paths, but means if you travel far enough in a straight line, you end up back where you started.
2. The Universe is cooling because of the expansion which dissipates matter and energy.
3. Given the vastness of the Universe, there are probably millions of planets like Earth, but they are very hard to detect, so we are not yet sure.
4. We haven't explored any stars yet (except our Sun) simply because they are too far away. With current technology, to visit our nearest neighbor would take many thousands of years.
5. Einstein taught us that gravity is a property of mass. It is caused by any body with mass warping the spacetime around it. Latest work in something called M Theory suggests gravity may not be just a property of our Universe, but a property of a sort of super-universe we call the Multiverse.
I hope this goes some way to answering your questions, though it really requires more time and space to do them justice.
2. The Universe is cooling because of the expansion which dissipates matter and energy.
3. Given the vastness of the Universe, there are probably millions of planets like Earth, but they are very hard to detect, so we are not yet sure.
4. We haven't explored any stars yet (except our Sun) simply because they are too far away. With current technology, to visit our nearest neighbor would take many thousands of years.
5. Einstein taught us that gravity is a property of mass. It is caused by any body with mass warping the spacetime around it. Latest work in something called M Theory suggests gravity may not be just a property of our Universe, but a property of a sort of super-universe we call the Multiverse.
I hope this goes some way to answering your questions, though it really requires more time and space to do them justice.
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4) Freaking miles away - maybe 80,000 years to the nearest star with current technology
5) Not sure what you mean by "the reason behind" - but if you need a way to understand what the theory means...Imagine taking a bowling ball and placing it on a bed - it would create a depression on the surface (or a "well"). Now imagine placing a basketball on the bed, the "well" would be much smaller - bigger mass, bigger well - The theory is the same, but in three dimensions
5) Not sure what you mean by "the reason behind" - but if you need a way to understand what the theory means...Imagine taking a bowling ball and placing it on a bed - it would create a depression on the surface (or a "well"). Now imagine placing a basketball on the bed, the "well" would be much smaller - bigger mass, bigger well - The theory is the same, but in three dimensions