Are We Living in a Black Hole?

Let’s rewind the clock. Before humans existed, before Earth formed, before the sun ignited, before galaxies arose, before light could even shine, there was the Big Bang. This happened 13.8 billion years ago.

But what about before that? Many physicists say there is no before that. Time began ticking, they insist, at the instant of the Big Bang, and pondering anything earlier isn’t in the realm of science. We’ll never understand what pre-Big Bang reality was like, or what it was formed of, or why it exploded to create our universe. Such notions are beyond human understanding.

But a few unconventional scientists disagree. These physicists theorize that, a moment before the Big Bang, all the mass and energy of the nascent universe was compacted into an incredibly dense—yet finite—speck. Let’s call it the seed of a new universe. (See also: “Origins of the Universe.”)

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CrazyNeutrino said:

Are We Living in a Black Hole?

Let’s rewind the clock. Before humans existed, before Earth formed, before the sun ignited, before galaxies arose, before light could even shine, there was the Big Bang. This happened 13.8 billion years ago.

But what about before that? Many physicists say there is no before that. Time began ticking, they insist, at the instant of the Big Bang, and pondering anything earlier isn’t in the realm of science. We’ll never understand what pre-Big Bang reality was like, or what it was formed of, or why it exploded to create our universe. Such notions are beyond human understanding.

But a few unconventional scientists disagree. These physicists theorize that, a moment before the Big Bang, all the mass and energy of the nascent universe was compacted into an incredibly dense—yet finite—speck. Let’s call it the seed of a new universe. (See also: “Origins of the Universe.”)

more…

We could be nothing more than a god’s fart.

PermeateFree said:

CrazyNeutrino said:

Are We Living in a Black Hole?

Let’s rewind the clock. Before humans existed, before Earth formed, before the sun ignited, before galaxies arose, before light could even shine, there was the Big Bang. This happened 13.8 billion years ago.

But what about before that? Many physicists say there is no before that. Time began ticking, they insist, at the instant of the Big Bang, and pondering anything earlier isn’t in the realm of science. We’ll never understand what pre-Big Bang reality was like, or what it was formed of, or why it exploded to create our universe. Such notions are beyond human understanding.

But a few unconventional scientists disagree. These physicists theorize that, a moment before the Big Bang, all the mass and energy of the nascent universe was compacted into an incredibly dense—yet finite—speck. Let’s call it the seed of a new universe. (See also: “Origins of the Universe.”)

more…

We could be nothing more than a god’s fart.

I guess in some way we are ejected matter

CrazyNeutrino said:

I guess in some way we are ejected matter

If we’re made in god’s image, that explains why some people are a-holes.

Divine Angel said:

CrazyNeutrino said:

I guess in some way we are ejected matter

If we’re made in god’s image, that explains why some people are a-holes.

If we are all made in God’s image, maybe that possibly explains why we can all be arseholes when asked for a favour?

But what about before that? Many physicists say there is no before that

yeah right

the only reason is that’s there’s no before that is because it throws out their theories

if you don’t understand it – get rid of it

Cant talk, Wookster Report.

if you don’t understand it – make up some shit.

radical idea

the big bang didn’t just happen by mistake – there was some prime mover (not “god”) that got the thing going

I have always suspected that the whole universe was just a little too like everything is good in the garden

so some monkeys on some rock floating around a star and have only have had science for perhaps a few centuries have cracked the mystery of the universe?

don’t bet on it.

> Are We Living in a Black Hole?

This topic makes an appearance on this forum every couple of years. The simple answer is “No, we aren’t”. The more complicated answer is that we would be living in a black hole only if the Universe’s expansion was going to reverse in the future leading to the big crunch – the opposite of a big bang.

The possibility that we were living in a black hole was proposed by Einstein in 1930, and possibly earlier.

Cosmology is now sufficiently advanced that we know for sure that the Universe’s expansion is going to continue for ever. This was almost certain even before dark energy was discovered. The critical density of the universe is the density above which we live in a black hole. The real density of the universe (including dark matter) was measured to be below 30% of critical in 1995. So we don’t live in a black hole.

Dark energy makes it even more certain. The last doubts were killed off in the year 2011.

mollwollfumble said:

Cosmology is now sufficiently advanced that we know for sure that the Universe’s expansion is going to continue for ever.

How can we possibly know that for sure when we don’t know what lies outside our observable Universe, or for that matter what drives the expansion of the space?

The Rev Dodgson said:

mollwollfumble said:

Cosmology is now sufficiently advanced that we know for sure that the Universe’s expansion is going to continue for ever.

How can we possibly know that for sure when we don’t know what lies outside our observable Universe, or for that matter what drives the expansion of the space?

I found this bit from wiki, “In models where dark energy is a cosmological constant, the universe will expand exponentially with time from now on, coming closer and closer to a de Sitter spacetime.”

from Accelerating universe

Theories for the consequences to the universe

As the Universe expands, the density of radiation and ordinary and dark matter declines more quickly than the density of dark energy (see equation of state) and, eventually, dark energy dominates. Specifically, when the scale of the universe doubles, the density of matter is reduced by a factor of 8, but the density of dark energy is nearly unchanged (it is exactly constant if the dark energy is a cosmological constant).

Current observations indicate that the dark energy density is already greater than the mass-energy density of radiation and matter (including dark matter). In models where dark energy is a cosmological constant, the universe will expand exponentially with time from now on, coming closer and closer to a de Sitter spacetime. In this scenario the time it takes for the linear size scale of the universe to expand to double its size is approximately 11.4 billion years. Eventually all galaxies beyond our own local supercluster will redshift so far that it will become hard to detect them, and the distant universe will turn dark.

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We really need extremely powerful telescopes to see past the expanding galaxies right to the edge of the expanding universe.

CrazyNeutrino said:

We really need extremely powerful telescopes to see past the expanding galaxies right to the edge of the expanding universe.

But that still would give us no certainty about what the Universe will be doing billions of years down the track.

I have no problem with a statement that theory x predicts y; but to say that y is “certain” based on that seems to me to be going way too far.

The Rev Dodgson said:

CrazyNeutrino said:

We really need extremely powerful telescopes to see past the expanding galaxies right to the edge of the expanding universe.

But that still would give us no certainty about what the Universe will be doing billions of years down the track.

I have no problem with a statement that theory x predicts y; but to say that y is “certain” based on that seems to me to be going way too far.

It’s like the recent David Attenborough doco about flying reptiles.
He said it was the largest creature ever to fly at a 50 foot wingspan. There is no evidence that it ever flew, only that it had very large wings.

He said it was the largest creature ever to fly at a 50 foot wingspan. There is no evidence that it ever flew, only that it had very large wings.

i would imagine that they say it flew because studies of its skeleton indicated that it was capable of flight so they assume it did. same as if you dug up a prehistoric emu you could say that even though it had wings it would have been incapable of flight.

JudgeMental said:

He said it was the largest creature ever to fly at a 50 foot wingspan. There is no evidence that it ever flew, only that it had very large wings.

i would imagine that they say it flew because studies of its skeleton indicated that it was capable of flight so they assume it did. same as if you dug up a prehistoric emu you could say that even though it had wings it would have been incapable of flight.

Yea, just coz an animal has fossilised leg bones doesn’t mean it actually used the legs…

JudgeMental said:

He said it was the largest creature ever to fly at a 50 foot wingspan. There is no evidence that it ever flew, only that it had very large wings.

i would imagine that they say it flew because studies of its skeleton indicated that it was capable of flight so they assume it did. same as if you dug up a prehistoric emu you could say that even though it had wings it would have been incapable of flight.

I can imagine them paragliding off cliffs but maybe having to walk back up?

Yea, just coz an animal has fossilised leg bones doesn’t mean it actually used the legs…

sounds like some people i know.

right to the edge of the expanding universe.
————————————————————————————

Well you can’t see that from here (no matter the tech), unless we are on the edge…

Then I would suggest we are very thin… like butter scraped over to much bread.

well I can’t believe its butter

not butter