The size of the universe

[scooterscot]

How is science explaining what is beyond the known universe?

There is a horizon program out there called 'what is reality' you need to watch this.

Is the universe a term merely to give what we know a boundary?

Some of the most interesting ideas I like to follow focus on the relationship the known universe shares with mathematics.

Why should that be so? Equally fascinating as it is perplexing.

[d000hg]

Not heard of preons before... are they just someone's idea they thought of?

[PAH]

'what is reality'

focus on the relationship the known universe shares with mathematics.

Reality is a perception from limited senses, we're only human after all. Mathematics is a construct to try to make sense of those senses.

One example of where things get weird: There are parts of the universe moving at faster than the speed of light.

Maybe that's why they're invisible, or dark.

[d000hg]

There are parts of the universe moving at faster than the speed of light.

I don't think there are.

[NotAllThere]

According to some theories there are parts of the universe which are beyond our horizon, as they moved away from us so fast, the light from them hasn't got here yet.

[Doggy Styles]

According to some theories there are parts of the universe which are beyond our horizon, as they moved away from us so fast, the light from them hasn't got here yet.

Isn't the speed of light constant regardless of the speed of the source away from us?

Or is that another fine theory debunked?

[OwlHoot]

I don't think there are.

Space pours into a black hole faster than light speed for a distant outside observer.

Oh and everything beyond our cosmic horizon, 45 billion light years away from us in any direction, is receding faster than light speed.

[TimberWolf]

According to some theories there are parts of the universe which are beyond our horizon, as they moved away from us so fast, the light from them hasn't got here yet.

And the size of the unobservable universe is supposedly way, way, way larger than the minuscule observable part shown by the OPs link. And objects on the edge of the observable universe are blinking out of our reach forever, all the time. Under the standard model and an inflationary universe this is put down to space stretching, without a violation of the speed of light being necessary, though most of the universe isn't understood.

[NotAllThere]

There's no contradiction. You don't notice an event until the light from that event reaches you. Just like a the sun could blow up now, and we wouldn't know about it for another eight minutes.

[Paddy]

Isn't the speed of light constant regardless of the speed of the source away from us?

Or is that another fine theory debunked?

Time or light is constant, and it is not time!

In 1971, experimenters from the U.S. Naval Observatory undertook an experiment to test time dilation . They made airline flights around the world in both directions, each circuit taking about three days. They carried with them four cesium beam atomic clocks. When they returned and compared their clocks with the clock of the Observatory in Washington, D.C., they had gained about 0.15 microseconds compared to the ground based clock.
Eastward Journey Westward Journey
Predicted -40 +/- 23 ns + 275 +/- 21 ns
Measured -59 +/- 10 ns + 273 +/- 7 ns