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How do we know that the universe is isotropic and not, for example, fractal in its structure?

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Categories: Our universe.

Tags: physics, cosmology.

 

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When cosmologists talk of the early universe, what yardstick do they use to measure time?

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Categories: Our universe.

Tags: physics, cosmology.

 

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Does the whole universe have spin?

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Categories: Our universe.

Tags: physics, cosmology.

 

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Do all protons (neutrons, electrons) have exactly the same mass and charge, or are there minute differences from one to another?

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Categories: Our universe.

Tags: physics, sub-atomic.

 

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How can a photon have momentum when it has no mass?

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Categories: Our universe.

Tags: physics.

 

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Can you, by calculating the relative speeds and positions of stars and galaxies, calculate the point of origin for the big bang?

Considering we have mapped the relative speeds and positions of thousands of galaxies, and so know how fast they are moving and where to, has anyone tried and run the whole process in reverse to see where they all originated from?

This should be ground zero for the big bang (if all matter originated in a point) and would be some evidence for the theory that all matter originated from a single point.

if this point exists, what would be there? Would there be galaxies and stars closer to the point or would that area of the universe be empty of all matter (it having all been propelled out by the big bang)?

 

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  • Asked by ukbandit
  • on 2011-01-04 11:22:33
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Categories: Our universe.

Tags: Universe, bigbang.

 

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Grow Plants On Other Planets?

can we actually grow plants in a controlled environment (giving oxygen and other things they require to grow) on other planets?

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  • Asked by Parhawk
  • on 2010-12-27 13:02:39
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Categories: Our universe.

Tags: lifeonotherplanets.

 

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is "The Big Bang Theory" the only answer?

what is the pssibility of any other theory other than the big bang theory explaing the creation of the universe as we know now? even if it is then what caused the big bang?

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  • Asked by Parhawk
  • on 2010-12-27 12:55:21
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Categories: Our universe.

Tags: bigbangtheory.

 

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Spooky Action Not So Spooky?

It's occurred to me that quantum entanglement's so-called "spooky action at a distance" could be explained if the entangled particles are actually not "at a distance". That is, that there is a "0th dimension" - possibly the size of the whole universe - in which all matter is at a single point.

Has anyone explored this concept?

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Categories: Our universe.

Tags: quantumphysics, dimensions, quantum, entanglement.

 

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Why is speed of light the limit?

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  • Asked by sid910
  • on 2010-12-26 07:17:12
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Categories: Our universe.

Tags: behavouroflight.

 

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