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The problem of investigating life on moons that could host it



 
 
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  #1  
Old June 30th 18, 01:14 AM posted to sci.astro.amateur
RichA[_6_]
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Default The problem of investigating life on moons that could host it

So they send a mission to Enceladus. They find no life. "Ah well, maybe the equipment isn't good enough yet?" 10 years pass, another mission is sent. This time they find bacteria and viruses. Now, was this missed the first time around, or was it evolved contamination from the first ship?

https://www.bbc.com/news/science-environment-44630121

  #2  
Old June 30th 18, 01:23 AM posted to sci.astro.amateur
Chris L Peterson
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Default The problem of investigating life on moons that could host it

On Fri, 29 Jun 2018 17:14:01 -0700 (PDT), RichA
wrote:

So they send a mission to Enceladus. They find no life. "Ah well, maybe the equipment isn't good enough yet?" 10 years pass, another mission is sent. This time they find bacteria and viruses. Now, was this missed the first time around, or was it evolved contamination from the first ship?

https://www.bbc.com/news/science-environment-44630121


All life on Earth evolved from a single common ancestor, and shares a
huge amount of common genetic coding. Anything we leave behind will be
readily identifiable as originating on Earth. Even if alien life uses
the same genetic chemistry as Earth life, there's no chance it's going
to code for the same genes (and especially for all the inactive
segments).
  #3  
Old June 30th 18, 06:27 AM posted to sci.astro.amateur
RichA[_6_]
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Default The problem of investigating life on moons that could host it

On Friday, 29 June 2018 20:23:30 UTC-4, Chris L Peterson wrote:
On Fri, 29 Jun 2018 17:14:01 -0700 (PDT), RichA
wrote:

So they send a mission to Enceladus. They find no life. "Ah well, maybe the equipment isn't good enough yet?" 10 years pass, another mission is sent. This time they find bacteria and viruses. Now, was this missed the first time around, or was it evolved contamination from the first ship?

https://www.bbc.com/news/science-environment-44630121


All life on Earth evolved from a single common ancestor, and shares a
huge amount of common genetic coding. Anything we leave behind will be
readily identifiable as originating on Earth. Even if alien life uses
the same genetic chemistry as Earth life, there's no chance it's going
to code for the same genes (and especially for all the inactive
segments).


Unless panspermia is right and it came from the same comet, comet swarm, etc.
  #4  
Old June 30th 18, 07:21 AM posted to sci.astro.amateur
Paul Schlyter[_3_]
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Default The problem of investigating life on moons that could host it

On Fri, 29 Jun 2018 18:23:29 -0600, Chris L Peterson
wrote:
Even if alien life uses
the same genetic chemistry as Earth life, there's no chance it's

going
to code for the same genes (and especially for all the inactive
segments).


The chance may be negligibly small, but claiming that the chance is
zero is an exaggeration.
  #5  
Old June 30th 18, 08:57 AM posted to sci.astro.amateur
Gerald Kelleher
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Default The problem of investigating life on moons that could host it

Life on this planet and indeed physical processes throughout creation has a geometry to it -

http://www.maths.surrey.ac.uk/hosted...nacci/fib.html

Animate and inanimate existence is built around this geometry from the smallest organism on Earth to stellar evolution and perhaps greater structures -

http://astrobob.areavoices.com/files...Hubble_FEA.jpg

The rubbish of the 'theory of everything' is a distraction from the appreciation in our journey through life we pick up the Eternal in nature and this beauty resonates with the spirited and those who can be inspired/spiritual.


  #6  
Old June 30th 18, 01:58 PM posted to sci.astro.amateur
Chris L Peterson
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Default The problem of investigating life on moons that could host it

On Sat, 30 Jun 2018 08:21:37 +0200, Paul Schlyter
wrote:

On Fri, 29 Jun 2018 18:23:29 -0600, Chris L Peterson
wrote:
Even if alien life uses
the same genetic chemistry as Earth life, there's no chance it's

going
to code for the same genes (and especially for all the inactive
segments).


The chance may be negligibly small, but claiming that the chance is
zero is an exaggeration.


Not much. If the chance is smaller than can be reasonably allowed for
in the lifetime of the universe, zero isn't a bad assessment. Like the
chance of you appearing on the other side of the Earth because of your
quantum wave function. Non-zero chance, but so small that it can be
treated as such.
  #7  
Old June 30th 18, 01:59 PM posted to sci.astro.amateur
Chris L Peterson
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Posts: 10,007
Default The problem of investigating life on moons that could host it

On Fri, 29 Jun 2018 22:27:13 -0700 (PDT), RichA
wrote:

On Friday, 29 June 2018 20:23:30 UTC-4, Chris L Peterson wrote:
On Fri, 29 Jun 2018 17:14:01 -0700 (PDT), RichA
wrote:

So they send a mission to Enceladus. They find no life. "Ah well, maybe the equipment isn't good enough yet?" 10 years pass, another mission is sent. This time they find bacteria and viruses. Now, was this missed the first time around, or was it evolved contamination from the first ship?

https://www.bbc.com/news/science-environment-44630121


All life on Earth evolved from a single common ancestor, and shares a
huge amount of common genetic coding. Anything we leave behind will be
readily identifiable as originating on Earth. Even if alien life uses
the same genetic chemistry as Earth life, there's no chance it's going
to code for the same genes (and especially for all the inactive
segments).


Unless panspermia is right and it came from the same comet, comet swarm, etc.


Sure. But if panspermia is right (which it almost certainly is not, at
least in terms of delivering complex life) then it doesn't really
matter, since all life would be the same. "Earth life" wouldn't have
so much meaning.
  #8  
Old July 2nd 18, 05:21 PM posted to sci.astro.amateur
Jibini Kula Tumbili Kujisalimisha
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Posts: 331
Default The problem of investigating life on moons that could host it

RichA wrote in
:

On Friday, 29 June 2018 20:23:30 UTC-4, Chris L Peterson wrote:
On Fri, 29 Jun 2018 17:14:01 -0700 (PDT), RichA
wrote:

So they send a mission to Enceladus. They find no life. "Ah
well, mayb

e the equipment isn't good enough yet?" 10 years pass, another
mission is sent. This time they find bacteria and viruses. Now,
was this missed the first time around, or was it evolved
contamination from the first ship?

https://www.bbc.com/news/science-environment-44630121


All life on Earth evolved from a single common ancestor, and
shares a huge amount of common genetic coding. Anything we
leave behind will be readily identifiable as originating on
Earth. Even if alien life uses the same genetic chemistry as
Earth life, there's no chance it's going to code for the same
genes (and especially for all the inactive segments).


Unless panspermia is right and it came from the same comet,
comet swarm, etc.


If it's contamination from the previous probe, there will be
virtually zero genetic shift from the parent. If it's native, even
if it is carbon based (highly likely), even if it uses the same
gentic bases, even if it uses DNA, it will be at least as different
from anything on earth as the variation within earth based bacteria
and viruses, and will match none of them.

The odds of bacteria evolving separately that are that similar to
ours are pretty slim. The odds of them being *identical* are
indistinguishable from zero.

In short, your question is stupid. (And so are you, but we knew
that already.)

--
Terry Austin

Vacation photos from Iceland:
https://plus.google.com/u/0/collection/QaXQkB

"Terry Austin: like the polio vaccine, only with more asshole."
-- David Bilek

Jesus forgives sinners, not criminals.

  #9  
Old July 2nd 18, 05:40 PM posted to sci.astro.amateur
Chris.B[_3_]
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Posts: 1,001
Default The problem of investigating life on moons that could host it

On Monday, 2 July 2018 18:21:26 UTC+2, Dugh! wrote:

In short, your question is stupid. (And so are you, but we knew
that already.)


Construct a sentence as an example of irony.

  #10  
Old July 2nd 18, 06:17 PM posted to sci.astro.amateur
Jibini Kula Tumbili Kujisalimisha
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Posts: 331
Default The problem of investigating life on moons that could host it

"Chris.B" wrote in news:cff2933a-8d85-4b57-
:

On Monday, 2 July 2018 18:21:26 UTC+2, Dugh! wrote:

In short, your question is stupid. (And so are you, but we knew
that already.)


Construct a sentence as an example of irony.

I know you are, but what am I?

--
Terry Austin

Vacation photos from Iceland:
https://plus.google.com/u/0/collection/QaXQkB

"Terry Austin: like the polio vaccine, only with more asshole."
-- David Bilek

Jesus forgives sinners, not criminals.

 




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