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| Topic: Quick Tour of the Universe... | |
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Quick Tour of the Universe...
A walk through of some of the latest deep space images from the Hubble Space Telescope. http://www.youtube.com/watch?v=OG2Pa8VWIEk&feature=player_embedded# When Hubble Opened its New Eyes http://www.youtube.com/watch?v=9bytNgT7l8k&feature=related You Are Here http://www.youtube.com/watch?v=e7t5d0eseIs&feature=fvw |
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I like the one "You are here"
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I like the one "You are here" i second this |
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Quick Tour of the Universe... A walk through of some of the latest deep space images from the Hubble Space Telescope. http://www.youtube.com/watch?v=OG2Pa8VWIEk&feature=player_embedded# When Hubble Opened its New Eyes http://www.youtube.com/watch?v=9bytNgT7l8k&feature=related You Are Here http://www.youtube.com/watch?v=e7t5d0eseIs&feature=fvw 
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YOU ARE HERE is great, however, a little long. It really puts our existence and importance into perspective.
However, I noticed a slight error, or incongruity. It states that the universe is 13.7 billion years old, but it is 93 billion light years wide. Assuming the universe started out as a singularity (single point) then it would have to have expanded must faster than the speed of light. the only way I can account for this (I am NOT a physicist), is that the speed of light is constant in whatever medium it passes through. So, possibly in the medium of space (whatever it consists of) then the speed of light is approx 186,00 mps. But, I suppose in the medium of nothing, perhaps it can go much faster. Any other theories?? |
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I guess my questions would be:
What is space: A gas, liquid, or solid? Does the universe have limits, dimensions? If parts of the galaxy are moving at the speed of light. Could we technically achieve travel by standing still? |
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YOU ARE HERE is great, however, a little long. It really puts our existence and importance into perspective. There is the "Holographic Universe" theory, put forth by David Bohm which, if true, would indicate that spacetime is "grainy" and not actually a "continuum". (The GEO600 gravitational wave detector has found some "jitter" that physicist Craig Hogan believes may be actual evidence of the "graniness" of spacetime.) If that's true, then the speed of light might just be a factor of the size of the "grains", which would mean that the the speed of light would be relative to the size of the universe and not a constant at all.
However, I noticed a slight error, or incongruity. It states that the universe is 13.7 billion years old, but it is 93 billion light years wide. Assuming the universe started out as a singularity (single point) then it would have to have expanded must faster than the speed of light. the only way I can account for this (I am NOT a physicist), is that the speed of light is constant in whatever medium it passes through. So, possibly in the medium of space (whatever it consists of) then the speed of light is approx 186,00 mps. But, I suppose in the medium of nothing, perhaps it can go much faster. Any other theories?? |
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I don't know what space is. But there does seem to be some sort of fabric of space, possibly strings (like in string theory) and branes. so if there is something in there, it is a medium which could slow down light. However, at the edges of the universe, where there is truly nothing, perhaps the speed of light is infinite?
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YOU ARE HERE is great, however, a little long. It really puts our existence and importance into perspective. However, I noticed a slight error, or incongruity. It states that the universe is 13.7 billion years old, but it is 93 billion light years wide. Assuming the universe started out as a singularity (single point) then it would have to have expanded must faster than the speed of light. the only way I can account for this (I am NOT a physicist), is that the speed of light is constant in whatever medium it passes through. So, possibly in the medium of space (whatever it consists of) then the speed of light is approx 186,00 mps. But, I suppose in the medium of nothing, perhaps it can go much faster. Any other theories?? Not really a theory, but a metaphor. It would be like running in a bus or plane in motion. The larger objects are already moving, but you are experiencing your own relative velocity within the moving bus or plane. I think this can be applied to space-time, which I believe itself is moving. Within the medium of space-time, light travels at the constant 186Kmps. Therefore while light has a constant rate of speed, space-time has no such constant. |
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