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The universe goes on forever and ever

borg69unimatrix said:
That is an interesting point. We measure time by Earths rotations around the sun broken down into years, months, days, hours, seconds with a random (?) Starting point of BC and AD. It's very earth specific as each planet spins and revolves differently. How does one perceive time passing in outer space? Does it, without the contextual reference of a spinning planet or a clock to look at?

How did BC civilizations calculate dates (birth dates) ? Alexander the great didn't go around telling people he was 350 BC years old (rough guess).
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Perception of time is arbitrary and time, or the rate of change, is always dependent on the speed of its reference frame.

It seems as though measuring time was so important to early civilizations that astronomy is generally acknowledged to be among the oldest branches of science along with medicine and mathematics.
 
borg69unimatrix said:
That is an interesting point. We measure time by Earths rotations around the sun broken down into years, months, days, hours, seconds with a random (?) Starting point of BC and AD. It's very earth specific as each planet spins and revolves differently. How does one perceive time passing in outer space? Does it, without the contextual reference of a spinning planet or a clock to look at?

How did BC civilizations calculate dates (birth dates) ? Alexander the great didn't go around telling people he was 350 BC years old (rough guess).
Click to expand...

Alexander's birthday would have been defined by what year in his father's reign he was born.

In a few ancient cities they kept track of time from the founding of the city.
 
KJ.jpg
 
It's not the same kind of science as the law of Gravity for example. It's an assumption by scientists to say the least. They seem to change their tune every few years on wether space is limitless or not.
 
I wondered about this very thing when I was a kid. Looking up at the night sky, I wondered where it ends. And if there is an ending or wall, what's on the other side of that?

I finally got some answers when I read the book The Universe and Dr. Einstein by Lincoln Barnett. The book explains in layman’s terms some of the basic principles of Einstein's theories of relativity.

One of the principles is that matter has a gravitational field, which not only attracts other matter to it but also affects the dimensions themselves. The four dimensions of space-time (usually thought of as 3 of space and one of time, but physicists don't make that distinction) are actually curved by gravity.

The curving of a dimension results in a sort of circular continuous dimension rather than a linear one, much as a circle is a line with no beginning or end, but there is a diameter. The four dimensions curve back so the beginning meets the end. The diameter is related to how much gravity there is in the universe, which is directly related to how much matter is in the universe.

With a rough estimate of the total mass (matter) contained in the universe, and using Einstein's theories, physicists calculate the approximate diameter of the observable universe to be about 93 billion light-years. A light-year is the distance light travels in one year, approximately 6 trillion miles. So the diameter of the observable universe as we know it is roughly 558,000,000,000,000,000,000,000 miles. Very roughly speaking.

But don't try to go to the end and look for a wall or barrier. If you go there you'll find yourself back at the beginning, becuase the dimensions curve back onto themselves. If Einstein's theories are true, this also makes time travel conceivable.

And I'm not sure whose butt that is in reply #43, maybe one of the Kardashians, but it clearly demonstrates how a large amount of matter causes the dimensions to curve.
 
^ if the Universe curve to itself.
It doesn't explain what is outside the Universe ...
 
bw92116 said:
But don't try to go to the end and look for a wall or barrier. If you go there you'll find yourself back at the beginning, becuase the dimensions curve back onto themselves.
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This is not correct. There is also no "end," only the most distant we can see. If you arrived those most distant observable objects, they would look completely different (as opposed to billions of years old as they appear now), and you will just find more Universe beyond them. Also, dimensions don't "curve" because the Universe is flat (Euclidean).

Most of the stars you see at night are between 10 and 1000 light years away. That means you are looking at them as they appeared years and years ago. We see the Andromeda Galaxy as it appeared when the first ancestors of humans walked the Earth. Further still, to the most faint and distant objects, the Universe appears as it did when it was only a few hundred million years old. The light just hasn't gotten to us yet. So there is no "edge," only the limits of time and the speed of light.

Aristotle was half right: the Earth is indeed at the center of the observable Universe, but not the whole thing, which might go on forever. If you were to travel to those distant galaxies right now, they will look radically different, and you would see further into space than Earth could ever see.
 
None of will ever know however I believe there are multiple universes (picture a large black balloon with smaller balloons inside) I believe and now many scientist do, that A black hole in one of the smaller balloons swallowed the entire universe it was a part in that explosion, created our balloon in the big bang. It is impossible for us to imagine most f this as everything we know including our selves has an end. One thing I do know is no God created our universe and then 15 1/2 billion years later said let me create people!
 
Spiff said:
Haha, amusing to look at the posts by the humans who think they have the universe all figured out. The egos of our race have no bounds.
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Well then,
I bet someone said the same thing back in 1615?
I know the church didn't like figuring things out.
curiosity, learning, and knowledge are of course elements of the human I like to praise. But their are many with your view. Just think if the Dinosaur had spent more time studying the skies over the millions of years they ruled earth. Perhaps T-Rex would be talking and driving a hover craft today instead of dust in the wind?


... to abandon completely... the opinion that the sun stands still at the center of the world and the earth moves, and henceforth not to hold, teach, or defend it in any way whatever, either orally or in writing.

— The Roman Inquisition's injunction against Galileo, 1616
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Maybe not all figured out but working on it.
 
Telstra said:
I like to believe about reincarnation and karma ...
but logic tells me it is unlikely
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Why not? Dont you know that when planets, star or galaxy die..their remains will be absorbed to form a newborn one. Nothing really wasted in this world, the cycle will keep continue and the size will expanding.
If macroism already gave us example, why the concept can't work the same way with us? (microism) Of course, it works similarly ;)
What effected on larger scale will be applied to smaller scale, it's the law of universe.
 
JPGhost said:
Why not? Dont you know that when planets, star or galaxy die..their remains will be absorbed to form a newborn one. Nothing really wasted in this world, the cycle will keep continue and the size will expanding.
If macroism already gave us example, why the concept can't work the same way with us? (microism) Of course, it works similarly ;)
What effected on larger scale will be applied to smaller scale, it's the law of universe.
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Yes that is the law of physics.
Reincarnation and Karma are not the law of anything.
It is the law of magic where there is no proof.
 
^
Magic is real, I can summon bulbasaur if I want to 8-)
 
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