Science!
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@Machpants how can there be nothing? and then something?
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@mariner4life said in Science!:
@antipodean said in Science!:
@taniwharugby said in Science!:
Yeah I still struggle to understand how they can say this happened so many billion years back, when, well, billions of years...yeah yeah, science, but still...guess its easier whan you have such a big window 2.229 billion years, margin of error of 5 million...pfft.
@booboo also time, in terms of light years, some more staggering numbers
A light-year is a measurement of distance and not time (as the name might suggest). A light-year is the distance a beam of light travels in a single Earth year, or 6 trillion miles (9.7 trillion kilometers).
Yeah that always makes me feel really small.
The fact the that farthest star is reachable (if still around) if we travel at the speed of light for 9,000,000,000 years.
Even if we could travel at speed of light, the fact that we could do so for a year and not be very far into the universe is staggering.
What I found most interesting is given the expansion of the universe, we're currently living in an era where it's observable and provable. If the human race lives long enough, our ancestors will have to take our word for it, because they won't be able to observe it.
WHAT THE FUCK IS THE UNIVERSE EXPANDING IN TO????
That does my head in
And at the other end of things ... what was there BEFORE the Big Bang?
Apparently there wasn't even a "before" before...
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@mariner4life said in Science!:
@Machpants how can there be nothing? and then something?
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I can't compute it, I just accept it. In the same way I accept quantum physics
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@Machpants said in Science!:
I can't compute it, I just accept it. In the same way I accept quantum physics
need to start thinking for yourself pal
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@mariner4life said in Science!:
@antipodean said in Science!:
@mariner4life said in Science!:
@antipodean said in Science!:
@taniwharugby said in Science!:
Yeah I still struggle to understand how they can say this happened so many billion years back, when, well, billions of years...yeah yeah, science, but still...guess its easier whan you have such a big window 2.229 billion years, margin of error of 5 million...pfft.
@booboo also time, in terms of light years, some more staggering numbers
A light-year is a measurement of distance and not time (as the name might suggest). A light-year is the distance a beam of light travels in a single Earth year, or 6 trillion miles (9.7 trillion kilometers).
Yeah that always makes me feel really small.
The fact the that farthest star is reachable (if still around) if we travel at the speed of light for 9,000,000,000 years.
Even if we could travel at speed of light, the fact that we could do so for a year and not be very far into the universe is staggering.
What I found most interesting is given the expansion of the universe, we're currently living in an era where it's observable and provable. If the human race lives long enough, our ancestors will have to take our word for it, because they won't be able to observe it.
WHAT THE FUCK IS THE UNIVERSE EXPANDING IN TO????
That does my head in
Think of it as the interior of an expanding balloon. And I acknowledge the obvious other part of the analogy.
the obvious part is what gets me. As teh balloon expands, it takes up more of the room i am in. What room is the universe in?
Go outside. It's going to fill the world up eventually, but that size is hard for our brains to process as well I guess.
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@mariner4life said in Science!:
@antipodean said in Science!:
@mariner4life said in Science!:
@antipodean said in Science!:
@taniwharugby said in Science!:
Yeah I still struggle to understand how they can say this happened so many billion years back, when, well, billions of years...yeah yeah, science, but still...guess its easier whan you have such a big window 2.229 billion years, margin of error of 5 million...pfft.
@booboo also time, in terms of light years, some more staggering numbers
A light-year is a measurement of distance and not time (as the name might suggest). A light-year is the distance a beam of light travels in a single Earth year, or 6 trillion miles (9.7 trillion kilometers).
Yeah that always makes me feel really small.
The fact the that farthest star is reachable (if still around) if we travel at the speed of light for 9,000,000,000 years.
Even if we could travel at speed of light, the fact that we could do so for a year and not be very far into the universe is staggering.
What I found most interesting is given the expansion of the universe, we're currently living in an era where it's observable and provable. If the human race lives long enough, our ancestors will have to take our word for it, because they won't be able to observe it.
WHAT THE FUCK IS THE UNIVERSE EXPANDING IN TO????
That does my head in
Think of it as the interior of an expanding balloon. And I acknowledge the obvious other part of the analogy.
the obvious part is what gets me. As teh balloon expands, it takes up more of the room i am in. What room is the universe in?
Go outside. It's going to fill the world up eventually, but that size is hard for our brains to process as well I guess.
but what is "the world" in this case? what is outside the universe?
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@taniwharugby said in Science!:
@Machpants said in Science!:
I can't compute it, I just accept it. In the same way I accept quantum physics
need to start thinking for yourself pal
I've already tried that, it hurts too much
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@mariner4life said in Science!:
@mariner4life said in Science!:
@antipodean said in Science!:
@mariner4life said in Science!:
@antipodean said in Science!:
@taniwharugby said in Science!:
Yeah I still struggle to understand how they can say this happened so many billion years back, when, well, billions of years...yeah yeah, science, but still...guess its easier whan you have such a big window 2.229 billion years, margin of error of 5 million...pfft.
@booboo also time, in terms of light years, some more staggering numbers
A light-year is a measurement of distance and not time (as the name might suggest). A light-year is the distance a beam of light travels in a single Earth year, or 6 trillion miles (9.7 trillion kilometers).
Yeah that always makes me feel really small.
The fact the that farthest star is reachable (if still around) if we travel at the speed of light for 9,000,000,000 years.
Even if we could travel at speed of light, the fact that we could do so for a year and not be very far into the universe is staggering.
What I found most interesting is given the expansion of the universe, we're currently living in an era where it's observable and provable. If the human race lives long enough, our ancestors will have to take our word for it, because they won't be able to observe it.
WHAT THE FUCK IS THE UNIVERSE EXPANDING IN TO????
That does my head in
Think of it as the interior of an expanding balloon. And I acknowledge the obvious other part of the analogy.
the obvious part is what gets me. As teh balloon expands, it takes up more of the room i am in. What room is the universe in?
Go outside. It's going to fill the world up eventually, but that size is hard for our brains to process as well I guess.
but what is "the world" in this case? what is outside the universe?
No idea, I was only working on the balloon inside example and I can't imagine a balloon filling up the whole world but can imagine it expanding off into the distance. (I didn't explain myself properly on the first reply and likely haven't done any better now).
I'm in the it is what it is camp - otherwise it's sky fairy time ....
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@Nepia but if it expands off into the distance, what was 'in the distance' in the first place...surely just more 'space' for the balloon to expand into.
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@taniwharugby said in Science!:
@Nepia but if it expands off into the distance, what was 'in the distance' in the first place...surely just more 'space' for the balloon to expand into.
No idea.
And I'm ok with that.
I think.
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@mariner4life said in Science!:
@mariner4life said in Science!:
@antipodean said in Science!:
@mariner4life said in Science!:
@antipodean said in Science!:
@taniwharugby said in Science!:
Yeah I still struggle to understand how they can say this happened so many billion years back, when, well, billions of years...yeah yeah, science, but still...guess its easier whan you have such a big window 2.229 billion years, margin of error of 5 million...pfft.
@booboo also time, in terms of light years, some more staggering numbers
A light-year is a measurement of distance and not time (as the name might suggest). A light-year is the distance a beam of light travels in a single Earth year, or 6 trillion miles (9.7 trillion kilometers).
Yeah that always makes me feel really small.
The fact the that farthest star is reachable (if still around) if we travel at the speed of light for 9,000,000,000 years.
Even if we could travel at speed of light, the fact that we could do so for a year and not be very far into the universe is staggering.
What I found most interesting is given the expansion of the universe, we're currently living in an era where it's observable and provable. If the human race lives long enough, our ancestors will have to take our word for it, because they won't be able to observe it.
WHAT THE FUCK IS THE UNIVERSE EXPANDING IN TO????
That does my head in
Think of it as the interior of an expanding balloon. And I acknowledge the obvious other part of the analogy.
the obvious part is what gets me. As teh balloon expands, it takes up more of the room i am in. What room is the universe in?
Go outside. It's going to fill the world up eventually, but that size is hard for our brains to process as well I guess.
but what is "the world" in this case? what is outside the universe?
Nothing. It's not expanding into something.
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@antipodean said in Science!:
@mariner4life said in Science!:
@mariner4life said in Science!:
@antipodean said in Science!:
@mariner4life said in Science!:
@antipodean said in Science!:
@taniwharugby said in Science!:
Yeah I still struggle to understand how they can say this happened so many billion years back, when, well, billions of years...yeah yeah, science, but still...guess its easier whan you have such a big window 2.229 billion years, margin of error of 5 million...pfft.
@booboo also time, in terms of light years, some more staggering numbers
A light-year is a measurement of distance and not time (as the name might suggest). A light-year is the distance a beam of light travels in a single Earth year, or 6 trillion miles (9.7 trillion kilometers).
Yeah that always makes me feel really small.
The fact the that farthest star is reachable (if still around) if we travel at the speed of light for 9,000,000,000 years.
Even if we could travel at speed of light, the fact that we could do so for a year and not be very far into the universe is staggering.
What I found most interesting is given the expansion of the universe, we're currently living in an era where it's observable and provable. If the human race lives long enough, our ancestors will have to take our word for it, because they won't be able to observe it.
WHAT THE FUCK IS THE UNIVERSE EXPANDING IN TO????
That does my head in
Think of it as the interior of an expanding balloon. And I acknowledge the obvious other part of the analogy.
the obvious part is what gets me. As teh balloon expands, it takes up more of the room i am in. What room is the universe in?
Go outside. It's going to fill the world up eventually, but that size is hard for our brains to process as well I guess.
but what is "the world" in this case? what is outside the universe?
Nothing. It's not expanding into something.
my brain can not comprehend the concept of nothing
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Well this has turned into "something", and yes it hurts.
The big bang is a bit weird, but my understanding of it is also weak and it is nothing more than a theory.
Expansion of space
Main articles: Friedmann–Lemaître–Robertson–Walker metric and Expansion of the universe
General relativity describes spacetime by a metric, which determines the distances that separate nearby points. The points, which can be galaxies, stars, or other objects, are themselves specified using a coordinate chart or "grid" that is laid down over all spacetime. The cosmological principle implies that the metric should be homogeneous and isotropic on large scales, which uniquely singles out the Friedmann–Lemaître–Robertson–Walker metric (FLRW). This metric contains a scale factor, which describes how the size of the universe changes with time. This enables a convenient choice of a coordinate system to be made, called comoving coordinates. In this coordinate system, the grid expands along with the universe, and objects that are moving only because of the expansion of the universe, remain at fixed points on the grid. While their coordinate distance (comoving distance) remains constant, the physical distance between two such co-moving points expands proportionally with the scale factor of the universe.[13]So, assuming the above is true. Is it an ever expanding universe as Monty Python said?
Sums it up for me. I dunno and the more I think about it the more I know that I don't know, and neither does anybody else. -
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@mariner4life said in Science!:
I think about it the more I know that I don't know, and neither does anybody else.
known unknowns, as opposed to unknown unknowns
love me some Rummy. Much maligned, and a total arse, but gave us that at least.
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@mariner4life or knowns/unknowns expanding into nothing, or something that really is nothing
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@voodoo good point!
should we start a thread with a poll to determine which poster should be our Prophet, and we will let him or her tell us how it all started?
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What is a light-year?
