Question related to tv show How the Universe Works

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    Universe Works
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SUMMARY

The discussion centers on the apparent contradiction between the age of the universe, estimated at 14 billion years, and the existence of structures like the Sloan Wall, which spans over 100 billion light-years. Participants clarify that the age of the universe does not equate to its size, as the observable universe measures approximately 93 billion light-years across. This discrepancy is explained by the expansion of the universe, where space itself can expand faster than the speed of light, allowing distant objects to move apart without violating the laws of physics.

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  • Understanding of the Big Bang theory
  • Familiarity with the concept of the observable universe
  • Knowledge of cosmic inflation theory
  • Basic grasp of the speed of light and its implications in physics
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  • Research the concept of cosmic inflation and its role in the early universe
  • Learn about the observable universe and its measurements
  • Explore the implications of general relativity on cosmic expansion
  • Investigate the Sloan Digital Sky Survey and its findings on large-scale structures
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Astronomy enthusiasts, physics students, and anyone interested in understanding the complexities of the universe's expansion and large-scale structures.

ko_kyi
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This is probably a really stupid question, but I don't know where else to ask it.

I am a layman watching Science channel, the show "How the Universe Works" episode called Alien Galaxies. In it they described the large scale structure of the universe, and talked about the Sloan Wall, which is +100 billion light-years across. A quick wiki search says that an estimate of the age of the universe since the big bang is 14 billion years, more or less. How the hell can objects made of matter be 100 billion light-years apart in a 15 billion year old universe, if matter can't travel faster than light?

Thanks in advance for indulging my question.
 
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You are watching BS. It draws in viewers so they include it on TV, that's what television is all about.
 
I think in the very early stages, they presume that the universe expanded faster than the speed of light in the inflation theory
 
Curl said:
You are watching BS. It draws in viewers so they include it on TV, that's what television is all about.

In your own thread on solar roads you claim others who ignore details are "ignorant on all levels" and then you go and do the same here.

The age of the universe is not the same as the size of the universe.
The observable universe is thus a sphere with a diameter of about 28 billion parsecs (9.3 × 1010 light years).

http://en.wikipedia.org/wiki/Observable_universe#Size

That's 93 billion light years across - and this only the observable universe.

This is down to the expansion of the universe.

Although two objects can be moving away from each other slower than the speed of light, the space inbetween them expands - giving the appearance they are traveling faster than the speed of light and increasing the distance between them further than would be possible in the given travel time.

If you imagine two objects stationary in space relative to each other, with the space between them expanding at a rate of 1m per year. After a million years they'll be 1,000,000m further apart than they originally were without ever moving.
 
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