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(Phys Org2)   Researcher describes how extraterrestrial civilizations could colonize the galaxy even if they don't have starships but he's really flashing back to that time in HS when he did too much acid and listened to Rush for 27 straight hours   (phys.org) divider line
    More: Interesting, Extraterrestrial life, Planet, Extrasolar planet, extraterrestrial civilizations, planetary systems, Star, Irina K. Romanovskaya, extraterrestrial intelligence  
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610 clicks; posted to STEM » on 27 May 2022 at 3:08 PM (5 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook



21 Comments     (+0 »)
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2022-05-27 1:03:56 PM  
Well. Maybe. There are 200 billion stars in the Milky Way. There are estimated to be 50 billion rogue planets, but nobody really knows. Say there are 200 billion, just like stars. The average distance between stars in the Milky Way is about 5 light years. So the distance to the nearest rogue planet is probably similar to the distance to the nearest stars. Since we are assuming that the aliens are spreading without the benefit of some kind of magical rapid interstellar travel, they are going to have a hard time finding a nearby rogue planet that they can detect and can travel to to board. I mean, maybe they get lucky and there is one right near or passing through their starting system. Then, do they get lucky again and it is going somewhere they want to go? And will it get close enough for them to debark? And can they survive on a sunless frozen planet (radioactives?) long enough to get pass close enough to get off? Then will they get lucky again at their new location and be able to get on another rogue planet going somewhere else? Maybe if there were orders of magnitude more rogue planets than are suspected it might be possible; the galaxy would be swarming with them.
 
2022-05-27 3:22:37 PM  
"listened to Rush""Irina K. Romanovskaya proposes"
external-content.duckduckgo.comView Full Size
 
2022-05-27 3:22:52 PM  
Once you have 100% realistic simulations/holodecks, why would you need to go anywhere?
 
2022-05-27 3:29:23 PM  
First, recognize that moving to another star is so insanely slow, expensive, difficult, and risky that it is not worth the effort of attempting it while your own star still provides an energy gradient and has accessible raw material orbiting it.

Next, recognize that if you can travel to another star, you have effectively mastered living in space indefinitely, making the first point even stronger.

Finally, there is no point colonizing the stars because you're going to speciate due to lack of mixing.  You're not creating friendly neighbors, you're creating fresh rivals.

You move when you have no choice.  And there will be a lot of fighting over who moves, because it won't be everyone.

So... One star per species at any given time seems most likely.  There just isn't any benefit to spreading across the galaxy.
 
2022-05-27 3:31:32 PM  
♫ We built this planet... ♫
 
2022-05-27 3:37:41 PM  
 
2022-05-27 3:38:07 PM  
Low-Tech Spacefaring Civilizations
Youtube FEV5r8jdBvQ
 
2022-05-27 3:49:02 PM  
"extraterrestrials could use controlled nuclear fusion as the source of energy"

Prove it.
 
2022-05-27 3:51:23 PM  
For the world is hollow, and I have touched the sky.  For I am old, and I have also peed my pants.

Generation ships are interesting.
Generation X ships, not so much.
 
2022-05-27 3:56:15 PM  
There have been hard SF stories about some of these concepts for 50 years.

Way to be cutting edge, Mr. Researcher.
 
2022-05-27 3:56:53 PM  
That paper sounds dumb.  What are the odds that a high-tech civilization is having an existential crisis at the same time that a rogue planet just happens to wander by?  And the existential crisis is such that moving to a rogue planet is a solution?  And you can talk your population into it in the brief time the rogue planet is nearby?  And you can magic up some kind of science to survive not having a sun, but that wouldn't also have saved you from the existential crisis to begin with.

There are only about 10,000 science fiction writers who've written her paper better than she did.
 
2022-05-27 4:05:09 PM  

WelldeadLink: "extraterrestrials could use controlled nuclear fusion as the source of energy"

Prove it.


It's 20 light years away
 
2022-05-27 4:05:13 PM  
Sounds like someone published their outline for their sci-fi novel as a scientific paper.
 
2022-05-27 4:28:59 PM  

Aquapope: That paper sounds dumb.  What are the odds that a high-tech civilization is having an existential crisis at the same time that a rogue planet just happens to wander by?  And the existential crisis is such that moving to a rogue planet is a solution?  And you can talk your population into it in the brief time the rogue planet is nearby?  And you can magic up some kind of science to survive not having a sun, but that wouldn't also have saved you from the existential crisis to begin with.

There are only about 10,000 science fiction writers who've written her paper better than she did.


Given a telescope and a brain, you don't bother with rogue planets - they're not going to be even potentially habitable anyway.

Instead, you survey your immediate environment and figure out how long it'll last.  Earth has ~700 million years of habitability left, but the Solar system is probably good for many, many billions of years.

We have plenty of time to survey the skies and find the best possible next star to hop to, based on the stellar category, the exoplanets orbiting it, and when and how closely it will pass us.

Why try to go hundreds of light years when odds are something useful will pass within less than a light year of us in the next hundred million years or so?
 
2022-05-27 4:48:17 PM  
The key to interstellar travel is longer life.
 
2022-05-27 5:18:59 PM  
Fark user imageView Full Size

When Worlds Collide 1951
 
2022-05-27 5:43:23 PM  

starlost: [Fark user image 295x192]
When Worlds Collide 1951


miro.medium.comView Full Size

When Worlds Collide 1997
 
2022-05-27 7:06:34 PM  

LewDux: "listened to Rush""Irina K. Romanovskaya proposes"[external-content.duckduckgo.com image 535x262]


Fark user imageView Full Size
 
2022-05-28 12:07:24 AM  
Some comedian once said that if you listen to Rush while on acid, it sounds like this:

"EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE!"
 
2022-05-28 8:18:04 AM  
Or perhaps a MOON???

Fark user imageView Full Size
 
2022-05-28 3:23:34 PM  

LewDux: [Youtube-video https://www.youtube.com/embed/FEV5r8jdBvQ]


Planet Ships
Youtube oim7VvUURd8
 
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