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  #26  
Old February 26, 2017, 05:00 PM
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Even at constant acceleration of g (10 m/s/s) it is possible to reach the ends of the observable universe within 1 human lifetime of 80 years. It takes light some 40 billion years to travel that distance. Problem is there is no way to supply that much force to maintain that level of acceleration.
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  #27  
Old February 26, 2017, 05:29 PM
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Cracking a new dimension will ultimately solve this problem.

We are capable of doing it.

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Thank you for a thread like this. I've always been intrigued by space and astronomy.

And glad that we have some brilliant minds posting here...cue all the philosophers and scientists and laymen
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  #28  
Old February 26, 2017, 09:22 PM
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Thanks for the explanation Tonmoy.

Who can tell me what this equation stands for? :-)

N = R* • fp • ne • fl • fi • fc • L
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  #29  
Old February 26, 2017, 09:57 PM
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The biggest question in my mind (other than when Mushy will give up keeping) is whether we are alone in this Universe. I find it hard to believe considering how vast the Universe is but then why havent we made any contact?
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  #30  
Old February 26, 2017, 10:59 PM
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Quote:
Originally Posted by Jadukor
The biggest question in my mind (other than when Mushy will give up keeping) is whether we are alone in this Universe. I find it hard to believe considering how vast the Universe is but then why havent we made any contact?
There may be life but there is no need to say that its intelligent life. There is only one sentient species on this planet (at least currently) and thats if you classify species like the Neanderthals as a totally seperate species from us.

Even if there is another sentient species out there...there is no telling that it is still extant. Suppose they died out 50 million years ago. If they are 100 million light years away, even if they sent a signal, we still wouldn't detect it for another 50 million years. And we've only been searching for such signals for the past 100 years now. That is the equivalent of expecting a Test match to play out in 1 second.

Not only that but galaxies are actually moving apart from each other a rate that exceeds the speed of light. Thus there are parts of the universe that we will never be able to reach nor will any signals from there ever reach Earth.

Mind boggling.
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  #31  
Old February 27, 2017, 01:31 AM
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Quote:
Originally Posted by al Furqaan
There may be life but there is no need to say that its intelligent life. There is only one sentient species on this planet (at least currently) and thats if you classify species like the Neanderthals as a totally seperate species from us.

Even if there is another sentient species out there...there is no telling that it is still extant. Suppose they died out 50 million years ago. If they are 100 million light years away, even if they sent a signal, we still wouldn't detect it for another 50 million years. And we've only been searching for such signals for the past 100 years now. That is the equivalent of expecting a Test match to play out in 1 second.

Not only that but galaxies are actually moving apart from each other a rate that exceeds the speed of light. Thus there are parts of the universe that we will never be able to reach nor will any signals from there ever reach Earth.

Mind boggling.
Yeah mind boggling indeed. If we consider the Universe to be created 14 Billion years ago and our planet to be about 4.5 billion years old then we could say that the Universe has had enough time to have civilizations like our own in other distant galaxies. There is nothing special about our social system as NASA's continuous discoveries of other habitable planets is beginning to show. So to me, it isn't even a question of if.. it is rather when do we find signs of alien life/civilizations.

One of the reasons why we haven't made contact is perhaps because the distances are too great between us. We are 12,000 years or so old as a civilization and we invented radio communications for about a century or so which is nothing compared to the galactic age. So it also could be that other civilizations are as young as ours and did not yet have the technology.

On the flip side, perhaps civilizations did begin a billion years before we began and those far older civilizations have burnt themselves out just like we are likely to on earth.
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  #32  
Old February 27, 2017, 01:41 AM
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Another very interesting concept and perhaps a sign of an advanced civilization is the Dyson Sphere.
Freeman Dyson argued that as a civilization makes advancement in science it is likely to build mega-structure around it's Sun to harness all the solar energy and this would have an odd dimming effect when observed through telescope and other sources.
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  #33  
Old February 27, 2017, 09:45 AM
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Quote:
Originally Posted by Jadukor
Yeah mind boggling indeed. If we consider the Universe to be created 14 Billion years ago and our planet to be about 4.5 billion years old then we could say that the Universe has had enough time to have civilizations like our own in other distant galaxies. There is nothing special about our social system as NASA's continuous discoveries of other habitable planets is beginning to show. So to me, it isn't even a question of if.. it is rather when do we find signs of alien life/civilizations.

One of the reasons why we haven't made contact is perhaps because the distances are too great between us. We are 12,000 years or so old as a civilization and we invented radio communications for about a century or so which is nothing compared to the galactic age. So it also could be that other civilizations are as young as ours and did not yet have the technology.

On the flip side, perhaps civilizations did begin a billion years before we began and those far older civilizations have burnt themselves out just like we are likely to on earth.

While the universe is 13.8 billion years old, intelligent life could not have formed before a few billion years after. Hydrogen and Helium (Proton 1 and 2) were the key elements (probably the only ones) at the beginning of the universe. For more complex elements to form, it must be made inside stars (nuclear fusion) and seeded into the universe through Supernova. Hence we are all Star-child's.

Good news (or bad news) is that by the hypothesis of almost all astrophysicist, there is almost a 100% probability of life outside earth.

Also note, that while the scientist have found many earth like planets (planets where they presume that water would be in room temperature and its rocky and earth sized), however note that not all planets in Goldilocks zone would support life (as we know it). There may be planets like venus where the existence of CO2 has created greenhouse effect and made the planet too hot, or a mars that cannot sheild itself from solar winds.
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  #34  
Old February 27, 2017, 09:48 AM
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Quote:
Originally Posted by Jadukor
Another very interesting concept and perhaps a sign of an advanced civilization is the Dyson Sphere.
Freeman Dyson argued that as a civilization makes advancement in science it is likely to build mega-structure around it's Sun to harness all the solar energy and this would have an odd dimming effect when observed through telescope and other sources.
There is a SETI lecture on youtube discussing this very thing. I watched it a few months back, will try to find it and post it here.
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  #35  
Old February 27, 2017, 11:58 AM
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On the subject of life beyond our solar system...I think that life may be death in other parts of the universe.

Truly philosophical.
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  #36  
Old March 3, 2017, 10:04 PM
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Once gone past Algol, the demon star sucking in another, we do not exist out there.
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  #37  
Old April 5, 2017, 04:21 AM
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https://futurism.com/neil-degrasse-t...l-find-aliens/

Such a buzzkill
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  #38  
Old July 11, 2017, 11:41 PM
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Interesting development. Chinese Scientists teleported a Photon.

http://www.businessinsider.com/telep...nternet-2017-7
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  #39  
Old July 12, 2017, 06:30 AM
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Quote:
Originally Posted by Jadukor
Thanks for the explanation Tonmoy.

Who can tell me what this equation stands for? :-)

N = R* • fp • ne • fl • fi • fc • L
N is the number of intelligent civilizations able to communicate within our own galaxy.

This is Drakes equation mate.
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  #40  
Old July 12, 2017, 06:34 AM
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NASA are working on some new plasma thrusters. I have been recently interested in Payload rockets. Especially 4 stage and multi stage thrusters. Even though bending space and time is beyong our technological means, that is the only viable method of transporting ourselves around the universe, unless you count cryostasis. We all know how that went!
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  #41  
Old July 12, 2017, 06:40 AM
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Quote:
Another very interesting concept and perhaps a sign of an advanced civilization is the Dyson Sphere.
Freeman Dyson argued that as a civilization makes advancement in science it is likely to build mega-structure around it's Sun to harness all the solar energy and this would have an odd dimming effect when observed through telescope and other sources.
Ahh, the good ole Kardashev Scale

No matter how much we develop in a technological standpoint of view we are still a very primitive race.

The Kardashev scale really narrows down the progression of technology and makes how technological advancements look like a kid playing with lego, the scale was also elaborated on by Michio kaku.

A Type I civilisation is a given to species who have been able to harness all the energy that is available from a neighboring star, gathering and storing it to meet the energy demands of a growing population. This means that we would need to boost our current energy production over 100,000 times to reach this status.

a Type II civilization – can harness the power of their entire star (not merely transforming starlight into energy, but controlling the star). Several methods for this have been proposed. The most popular of which is the hypothetical ‘Dyson Sphere.’

Type III, where a species then becomes galactic traversers with knowledge of everything having to do with energy, resulting in them becoming a master race.

At the moment humans struggle to harness the power of lightning, we really need to stop killing each other if we want to make the world a better place. Hopefully, but very unlikely I will be able to see the human race at least become a Type 0.5 Civilisation in my lifetime.
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  #42  
Old July 12, 2017, 06:44 AM
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Anyone know what these are





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  #43  
Old July 12, 2017, 06:52 AM
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Another theory I have towards rocket science is, what if instead of ground based launches, we launch rockets from aircraft,flying in the stratosphere or closer to space. If rockets are launched from aircraft flying at an approximate altitude of 10000-15000, and launch at the equator an extra 1680 mph of orbital velocity is gained.

So we can virtually miniaturized the rockets since less fuel would be needed, and still deliver goods to ISS. Its a win-win situation.

However one possible draw back would be what kind of aircraft would need to be retrofitted to survive such pressures of a rocket launch. And the mathematics of wind resistance and wind speed also need to be taken into account

Perhaps, we should ask the russians to loan us the Antonov

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  #44  
Old July 13, 2017, 11:32 PM
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Any Asimov fans here? Anyone read the Foundation series?
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