Is there life elsewhere in the Universe??

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#997262 1-Mar-2014 20:12

garbonzai:
And at our current top speed of 40,000 kph, I don't know the maths exactly, but it takes thousands of years at 40k to one light year.

We originated in the big bang.

During the big bang, space itself expanded faster than the speed of light. This is why the further you look, the closer you get to viewing the big bang itself. So, we must have traveled faster than the speed of light during the big bang.

So, of course you can travel faster than the speed of light as this has occurred previously.

At least , travel but not in the conventional way. You'd have to use the same physics that allowed space to expand so quickly.

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#997268 1-Mar-2014 20:25

garbonzai: until someone named Scotty invents the Warp Drive, it's all theory, what's in our mind and what we choose to believe.

"Scotty" may be a little closer than we think if the reports on sites such as this, this and this are anything to be believed.

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#997309 1-Mar-2014 20:54

surfisup1000:
garbonzai:
And at our current top speed of 40,000 kph, I don't know the maths exactly, but it takes thousands of years at 40k to one light year.

We originated in the big bang.

During the big bang, space itself expanded faster than the speed of light. This is why the further you look, the closer you get to viewing the big bang itself. So, we must have traveled faster than the speed of light during the big bang.

So, of course you can travel faster than the speed of light as this has occurred previously.

At least , travel but not in the conventional way. You'd have to use the same physics that allowed space to expand so quickly.

I was thinking that today. The speed of light is currently max speed. If you traveled faster, the you will be invisible. As your "being" exists when light from you has not yet arrived

AS i understand from the many docos I have watched, the speed of light is the fastest we can go. Cannot recall the number but expansion of the universe is slower. 100,000 mph? So, if the Universe was created 13.7 billion years ago, and we are here now, 13.7 billion years later, how can we look into the stars back in time? As that light from 13.7 b or less, has already passed us?

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#997310 1-Mar-2014 20:56

surfisup1000:
garbonzai:
And at our current top speed of 40,000 kph, I don't know the maths exactly, but it takes thousands of years at 40k to one light year.

We originated in the big bang.

During the big bang, space itself expanded faster than the speed of light. This is why the further you look, the closer you get to viewing the big bang itself. So, we must have traveled faster than the speed of light during the big bang.

So, of course you can travel faster than the speed of light as this has occurred previously.

At least , travel but not in the conventional way. You'd have to use the same physics that allowed space to expand so quickly.

I sorta agree, as what you say, and not what I say means we can look at light that is just arriving now from the Big Bang. BUT, everything I have read / learnt, is that light speed is max speed

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#997317 1-Mar-2014 21:11

you can't see the light from the big bang dude :D
data for big bang is extrapolated
like virus to brains .. oops what did I just say ... forget that !

tdgeek

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#997322 1-Mar-2014 21:27

joker97: you can't see the light from the big bang dude :D
data for big bang is extrapolated
like virus to brains .. oops what did I just say ... forget that !

Yep, confusing. I had seen that our telescopes in space are just a few hundred million years from the big bang. I follow light years and looking at light that just got here from thousands of light years away, but did we get here before the Big Bang light did? ??? Ill email Amy Mainzer! I want to know!

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#997323 1-Mar-2014 21:43

you can't see the light from the big bang. we have no idea where the centre is/was. which direction do you look? it is all an extrapolation from data of the expansion of space-time.

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#997328 1-Mar-2014 22:21

tdgeek:
gzt:
Klipspringer: ...Why is the earth organized chaos? Why did the big bang explode in such a way that it formed a perfect little earth, in a perfect place, with perfect beauty?

We are a part of that creation and created from the same patterns. It is not surprising we should find this beautiful. Thinking of the big bang as an explosion is kind of misleading because there was not any space to explode into at that time. Nor was there even any time.

Hard to comprehend "no time"

I understand there wasn't time before the beginning of the universe as far as I am aware - space and time only exist within the universe - it is relative remember. Before the universe there was (in theory) no space, so no time either. That kind of means there wasn't a 2 minutes before.

This of course implies that there wasn't any life before the universe either - so we at least know there was a point at which time the total life in the universe was probably zero.

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garbonzai

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#997330 1-Mar-2014 22:29

tdgeek:
surfisup1000:
garbonzai:
And at our current top speed of 40,000 kph, I don't know the maths exactly, but it takes thousands of years at 40k to one light year.

We originated in the big bang.

During the big bang, space itself expanded faster than the speed of light. This is why the further you look, the closer you get to viewing the big bang itself. So, we must have traveled faster than the speed of light during the big bang.

So, of course you can travel faster than the speed of light as this has occurred previously.

At least , travel but not in the conventional way. You'd have to use the same physics that allowed space to expand so quickly.

I sorta agree, as what you say, and not what I say means we can look at light that is just arriving now from the Big Bang. BUT, everything I have read / learnt, is that light speed is max speed

Everything is a theory, we don't know speed of light is constant, if a black hole can bend light (in theory) then it's possible to speed up or slow down light through gravitational pull/push, exspansion/contraction maybe by vast amounts, we simply don't know.

In the "big bang" theory, the split second into the expansion, atomized objects and light could have expanded millions or billions of times faster than light speed, who knows.

A solid object could go faster than light if enough force/gravitational push-pull/expansion was on that object.

Up until the steam engine a human had never gone faster than 40mph (on the back of a horse) unless they jumped off a cliff.

I personal think that physics that has brought us our great leaps in technology the last 100-200 years is great, but to move forward, there must be something fundamentally different that we do not yet know.

:P

Klipspringer

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#997339 1-Mar-2014 23:18

TwoSeven:
tdgeek:
gzt:
Klipspringer: ...Why is the earth organized chaos? Why did the big bang explode in such a way that it formed a perfect little earth, in a perfect place, with perfect beauty?

We are a part of that creation and created from the same patterns. It is not surprising we should find this beautiful. Thinking of the big bang as an explosion is kind of misleading because there was not any space to explode into at that time. Nor was there even any time.

Hard to comprehend "no time"

I understand there wasn't time before the beginning of the universe as far as I am aware - space and time only exist within the universe - it is relative remember. Before the universe there was (in theory) no space, so no time either. That kind of means there wasn't a 2 minutes before.

This of course implies that there wasn't any life before the universe either - so we at least know there was a point at which time the total life in the universe was probably zero.

Time is not a physical thing. It exists only when we observe something. In this case the big bang. If for instance you were observing it happen time in this sense existed. Therefore what happened a moment before?

As time is not physical. How could the big bangbang have possibly produce it?

Time is finite or infinite? IMO its infinite

Fred99

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#997351 1-Mar-2014 23:27

joker97: you can't see the light from the big bang dude :D

While you can't see the light from the big bang , the (now red-shifted) light from shortly after (a few hundred thousand years) the big bang is visible as the cosmic microwave background radiation.
It can't be seen from before that time because photons interacted with free charged particles in the hot plasma, only when the plasma cooled and hydrogen atoms formed could photons propagate.
The existence and nature of the CMBR is strong evidence for the inflationary big bang theory .

surfisup1000

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#997358 1-Mar-2014 23:45

My point is that the universe expanded faster than the speed of light -- but it was space expanding as opposed to actual speed as we know it. Maybe the same physics behind expansion can one day be harnessed to travel faster than light.

Hopefully they discover this before all the atoms in the universe fly apart due to the accelerating space-time expansion.

JWR

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#997398 2-Mar-2014 03:54

garbonzai:
tdgeek:
surfisup1000:
garbonzai:
And at our current top speed of 40,000 kph, I don't know the maths exactly, but it takes thousands of years at 40k to one light year.

We originated in the big bang.

During the big bang, space itself expanded faster than the speed of light. This is why the further you look, the closer you get to viewing the big bang itself. So, we must have traveled faster than the speed of light during the big bang.

So, of course you can travel faster than the speed of light as this has occurred previously.

At least , travel but not in the conventional way. You'd have to use the same physics that allowed space to expand so quickly.

I sorta agree, as what you say, and not what I say means we can look at light that is just arriving now from the Big Bang. BUT, everything I have read / learnt, is that light speed is max speed

Everything is a theory, we don't know speed of light is constant, if a black hole can bend light (in theory) then it's possible to speed up or slow down light through gravitational pull/push, exspansion/contraction maybe by vast amounts, we simply don't know.

In the "big bang" theory, the split second into the expansion, atomized objects and light could have expanded millions or billions of times faster than light speed, who knows.

A solid object could go faster than light if enough force/gravitational push-pull/expansion was on that object.

Up until the steam engine a human had never gone faster than 40mph (on the back of a horse) unless they jumped off a cliff.

I personal think that physics that has brought us our great leaps in technology the last 100-200 years is great, but to move forward, there must be something fundamentally different that we do not yet know.

:P

'Everything' isn't a theory.

Actually, a scientific theory is a lot stronger than just someone's thoughts.

To be called a theory.. it has to backed up by experiment.

Until then, it's just a hypothesis or speculation.

JWR

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#997400 2-Mar-2014 04:09

Fred99:
joker97: you can't see the light from the big bang dude :D

While you can't see the light from the big bang , the (now red-shifted) light from shortly after (a few hundred thousand years) the big bang is visible as the cosmic microwave background radiation.
It can't be seen from before that time because photons interacted with free charged particles in the hot plasma, only when the plasma cooled and hydrogen atoms formed could photons propagate.
The existence and nature of the CMBR is strong evidence for the inflationary big bang theory .

Yes!

One of the greatest discoveries!

Athlonite

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#997403 2-Mar-2014 06:30

Fred99:
KiwiNZ: A problem we have is we only know the very distant past of the universe and a very small snap shot of it, we have no real idea of the present except in our little piece of it, and that is a very small number. So assumptions and calculations are done based on events billions of years ago and trying to fit them into our model. However the reality is the Universe may well be very different to what we now believe. So to look for life in other places in the present is looking back, way back in time. That gives so much scope for so much to be very wrong.

In terms of looking for evidence of life in other places, looking in our Milky Way galaxy would be a sensible place to start.
And it that case, despite the scale being immense - it's actually a pretty small spot in the universe. The galaxy is only 120,000 ly or so. 120,000 years is tiny fraction of the period of time that life has existed on Earth.
Within our galaxy there would appear to be over 10 billion candidate stars with "goldilocks zone" planetary systems.
Many are much closer than ~100,000 ly.
Remote sensing for evidence may be difficult - but look how far we've got in the past few decades.

please don't confuse Light years with normal years they're two completely different beasts a light year is the distance travelled by light in a vacuum for one earth year

1 Light Year = 9,460,536,000,000 km so bloody long way or 1135264320000000000 Km across and you'd need to be doing light speed just to make it across in 120000yrs

So unless we can figure out a way to travel many times the speed of light your children's children's children's children's children will most likely still only be able to make it to the edge of our solar system

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