StupidAndy

Aliens, Exist or Dont

Do aliens exsist?   63 members have voted

  1. 1. Do aliens exsist?

    • Yes
      39
    • No
      1
    • Need Evidence before i say Yes
      23

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67 posts in this topic

3 minutes ago, magnemoe said:

Then we are able to search for oxygen and methane at earth sized planets we will get an good answers about how common life is 
 

That's assuming it's life similar to life on Earth based on carbon and methane is the direct process of decomposition.

A life form based on silicon, for example, may breathe in nitrogen and when it decomposes, produce some sort of ammonia compound...

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Posted (edited)

48 minutes ago, adsii1970 said:

A life form based on silicon, for example, may breathe in nitrogen

You make me worry about my computer CPU. It's surrounded by the aggressive 78%-nitrogen atmosphere...

As melting point of the silicon nitride is 1900°C, probably their toilets are polished to shine by the sand blasting.

Edited by kerbiloid

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I'll just leave this here ... The playlist provides an interesting viewpoint on this subject

 

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I'll also share an alien video:

 

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I'm %99.9999999999 percent sure that there is alien life (microbes). But if there is intelligent life lurking in deep space, I would be surprised. :P

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On 18.3.2017 at 5:39 PM, adsii1970 said:

That's assuming it's life similar to life on Earth based on carbon and methane is the direct process of decomposition.

A life form based on silicon, for example, may breathe in nitrogen and when it decomposes, produce some sort of ammonia compound...

No it does not detect non carbon types of life, neither life without photosynthesis and it has to run for some time too. 
But then we get an list of earth like planets and how many of them have oxygen we have pretty solid data. 
 

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Yes probably but I doubt they are what we think they are. There are billions of planets. And billions of habitable planets as well. And I assume some of those have life on them.

Fire

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Yes they are there.

And no i dont like to see them tommorow. 

Why? Its like Hawkings said. If they come we are gone...

If Terranier(?) have some colonies in around like 50-100ly there is a possibility to Meet and converse and not Meet and Genozide. 

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Can't remember who'se quote it is but. 

Either we are all alone in the universe or we aren't. Both answers are equally scary.

 

 

If there is alien life, would we ever find it and classify it as "living". Just look at Earth. There are so many differences between life on Earth. From humans to trees, from trees to bacteria. Suppose we find life on Europa for example, would we even recognize it as life? 

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Posted (edited)

Happily, interstellar distances are enough huge to make an expansion useless and to frozen any originally hot nature.

Until somebody can send a battleship to another habitable star system, he/she/it would run out of rage, finish the overpopulation growth, make recyclable resouirce loop and become an old scrooge living in a overprotected asterioid belt near its native planet. Living 95% of its life in virtual/augmented reality.
Incommunicative (as it knows almost all it needs) and thus invisible for SETI, not agressive (as doesn't need more land to breed around, but can lose everything), not very curious (see p.1.), busy with suburban areas adaptations (i.e. building transit and communication outposts in other solar systems) and with mating the physics and mathematics to get a god-like power.

Almost necessary - a "hivemind", as its population will be decreasing, while every person getting 95% "standardized" using its hivenet.
So, any its person would become just a reflection of the hivemind..

(That's btw means that any individual "ET" would not be important, as it's just a reduced mind clone. It can produce them as many as required, and send in one-way missions as expendables.
So, not much sense in capturing and interrogating one.)

Probably, almost all interstellar contacts look like a meeting of Gandalf and Dumbledore on a desert island amid the ocean.
A five o'clock discussion about nothing between two cheaters with guns.

Edited by kerbiloid

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It's very hard to be invisible with a big enough civ. Waste heat gives you away.

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5 minutes ago, Bill Phil said:

Waste heat gives you away.

I think the Communication polutuon is more of a Probleme here?

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Posted (edited)

40 minutes ago, Bill Phil said:

It's very hard to be invisible with a big enough civ. Waste heat gives you away.

While you expand, build a lot and communicate with radiowaves.

When you already leave in an ivory tower, not expanding, counting every joule spent for communication and lighting, endlessly recycling every piece of matter in your room (making same atoms to be either a snack, or a sock, throwing it in to the utilizer), not much energy you need, not much energy you waste. 
Of course, a Gandalf civ always can detect Dumbledore civ in their telescopes. But we, troglodytes, no.

Edited by kerbiloid

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Posted (edited)

51 minutes ago, Bill Phil said:

It's very hard to be invisible with a big enough civ. Waste heat gives you away.

so primitve soup civilisation is less valuable than the current human model ... ? ... not sure whose primitive ... it can be at a previous stage at a later stage ...

the matter with human, they think they are the best and what's different from them is of no interest ... seriously ... if alien more evolved whatever the way scheme think like that ... gonna bode well ...

also the concept of civilisation ... well to much binded to our own evolve since the primitiv soup and the very local and specific solar system conditions  ... some others scheme/variation may exist ...

*grumpf* /rant

Edited by WinkAllKerb''

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On 3/17/2017 at 0:46 AM, Gaarst said:

Aliens don't exist until proven otherwise. That's how science works.

Edit: I personally think it is possible they exist, but opinion != fact

No, science makes no claims one way or the other about stuff with no evidence.

We can speak about probabilities, and there is a very high probability that life exists somewhere else in the universe.

Titan? Europa? intelligent life? not so sure.

Aliens that have visited Earth - very unlikely IMO

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1 hour ago, KerikBalm said:

 

We can speak about probabilities,

In that i differ, at least concerning complex life (multicellular, food chain, biocenosis, this sort of things). Probabilities need a data base and we only have one single sample. Also they need constraints to work with and we (at least i ... :-)) don't know about any constraints on distant planets except estimated temperature. And we call that "habitable zone". We see in our system how deceiving that can be: Venus is on the inner edge of the "habitable zone". Were it near Trappist or Proxima C. it would be crowded with aliens :sticktongue:. But in reality it is not really known as a cozy place.

But, really, i don't know.

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well, i said "speak"... but yes its intentionally hazy.

We know life must obey thermodynamics, and we know the elements and basic chemistry are the same everywhere.

https://en.wikipedia.org/wiki/Hypothetical_types_of_biochemistry

We know water and carbon based life works... 

Silicon is probably not going to work... carbon seems like a very solid choice... but the solvent seems much more open to other possibilities.

We don't know if a non-polar solvant could work, or if ammonia could work...

We can make rough estimates about the possibility of a habitable environment for water based life on a planet.

A planet where life could survive is not necessarily the same as a planet where life could start, but we can only make the vaguest of statements about this probability (0<x < or = 100).

If we find that Europa and Enceledus are sterile, but otherwise habitable then we know x is strictly less than 100.

We don't know if Methane solvents could work.

Even despite that, we know Earth's conditions work, and we have fairly good estimates for the number of stars similar to ours in the observable universe. Even using very conservative estimates, there should be a great deal of planets with similar physical conditions to Earth. Physics and chemistry being the same everywhere, the probability that another planet exists with conditions similar to ours that has life as well is very high.

What percent of stars have life on some body orbiting them.... that is basically a complete guess - but the question of if there is another world with life in the universe: just using our very limited observations that Earth's conditions can produce life is enough to conclude that there is a high probability of life elsewhere in the universe.

 

But.... a planet with microbes in another galaxy doesn't really matter from a practical perspective, does it? Practically speaking, the question is if any other planets or moons in our solar system (and perhaps nearby star systems) have microbes, and if there is another form of "intelligent" life in our galaxy (in this sense, intelligent enough for spaceflight or at least radio communication)

And for that question... we severely lack data.

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