Celtic Heroes

Wouldn't the universe be round like the earth and expands in all directions, so I think it would not be infinite.

Wouldn't the universe be round like the earth and expands in all directions, so I think it would not be infinite.

It's answered in above posts - the universe isn't round really it's just that you see it that way. Its similar to why you are always at the center no matter where you are. Each particle in the universe is always at the center from its point of view.

To quote the Doctor from Doctor who in the episode "angels" featuring the iconic character the weeping angels for the first time "we think of time as a long string of cause and effect when actually from a non linear perspective it is more a ball of spacy wacy timey wimy stuff"

I think you have confused thread syndrome?

I'm not confused.. I said that if he were to ask his teacher the teacher is obliged to refuse to answer because he/she might follow personal belief over science.

OK my bad you were posting on another thread at the time and I thought you may have been replying to the wrong one.

To quote the Doctor from Doctor who in the episode "angels" featuring the iconic character the weeping angels for the first time "we think of time as a long string of cause and effect when actually from a non linear perspective it is more a ball of spacy wacy timey wimy stuff"

I like the new Doctor Who series. I just try to mentally block out most of season 2.

Space does end and is not infinite but on the other hand it is constantly expanding

Space does end and is not infinite but on the other hand it is constantly expanding

I think you are confusing the visible edge of the universe with an actual volume. Read the previous posts for a definition.

The flatness of space (how well the angles of a triangle match an actual 180deg) at large scales is experimentally measured to show the actual universe to be a minimum of 50 times the volume of the visible to infinitely larger in volume.

Getting a more accurate answer to this question is actually pretty likely in our lifetime.

Space does end and is not infinite but on the other hand it is constantly expanding

I think you are confusing the visible edge of the universe with an actual volume. Read the previous posts for a definition.

The flatness of space (how well the angles of a triangle match an actual 180deg) at large scales is experimentally measured to show the actual universe to be a minimum of 50 times the volume of the visible to infinitely larger in volume.

Getting a more accurate answer to this question is actually pretty likely in our lifetime.

He might be saying that it isn't infinite via having a volume but the volume is constantly expanding via transfer of matter into energy but without an infinite amount of matter which our universe does not possess that it couldn't be truly infinite while it is indefinitely expanding making it infinite xD

XD possibly...

There is a visible edge that is receding. New matter and energy appear at the edge. And the energy of the visible universe remains constant. So how is that!?!?!??

Well the gravitational potential energy is maximum when things are very apart and minimum when they are together. Near the edge of our visible universe it is expanding same as stuff near us is expanding. So there is no lack of mass "outside" the visible which would cause the edges to collapse inward. This boundary condition of gravitational potential is where the new matter and energy comes from.

As far as we can tell space extends forever. But outside of being pretty sure it's a minimum of 50x bigger in volume than the visible universe we don't know much.

If anyone is interested here http://m.youtube.com/watch?v=32wIKaLkvc4 is a great series of physics lectures on cosmology free! It is from Leonard Susskind who is about as famous as hawking. The course does have some advanced math but on the whole he keeps it as simple and as straightforward as possible without resorting to arcane forumulas. It is about 5000x more informative and interesting than a documentary.

If anyone is interested here http://m.youtube.com/watch?v=32wIKaLkvc4 is a great series of physics lectures on cosmology free! It is from Leonard Susskind who is about as famous as hawking. The course does have some advanced math but on the whole he keeps it as simple and as straightforward as possible without resorting to arcane forumulas. It is about 5000x more informative and interesting than a documentary.

Lol Leonard isn't my favorite Scientist but he is way better than Hawking.. I found it so difficult to pay attention in astronomic lecture videos with his robot voice narrating.

I like leonard hoffstadter!