How Far Beyond Earth Could Humanity Expand?

Thread Starter

nsaspook

Joined Aug 27, 2009
16,348
To the mods on this site.

Please refrain from moving topics that are science related to Off-Topic because people want to have a little fun on a science based topic. This will only cause more off-topic comments IMO ...
 

cmartinez

Joined Jan 17, 2007
8,787
To the mods on this site.

Please refrain from moving topics that are science related to Off-Topic because people want to have a little fun on a science based topic. This will only cause more off-topic comments IMO ...
I agree. I love electronics because it's fun. Would a thread dealing with an electronic game be moved to off-topic just because it's not a "serious" subject?

If there ever was a serious question about the future of humanity it is precisely the one first posted in this thread. I fail to see how it cannot deserve to be in the science forum.
 

dcbingaman

Joined Jun 30, 2021
1,065
If I did my math right, I started with a ship leaving earth accelerating at 1G (nice because a human can easily handle that and keep his body in good shape by not allowing zero G and feel just like earth). As our traveler friend travels along, distance become shorter in his direction of travel in his reference frame, per the infamous sqrt(1-v^2/c^2). From his perspective he will cross the entire universe in about 100 days and the universe will have come to an end as he observes it all speeding up by the same factor. From earths perspective he will have traveled a fairly short distance (significantly less than a light year) with his acceleration slowing to a crawl as he approaches c his mass from earth reference increasing by the same factor. I did this will excel and a Reimann sum because I have no idea how you take the integral of the Lorenz factor to translate incremental velocities to absolute distance. So yes, it is possible in that sense. Maybe someone can check my math? I am having a hard time believing it is accurate.

Update: I made a minor mistake: I had acceleration in ft/s/s not meters/s/s. So it may be closer to a year, I will have to recalculate. That is what I get for rushing.
 
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Aus_DIYer

Joined May 2, 2023
52
There seems to be one important factor not thought of in this scenario of expanding humanity, in my opinion. Is it possible to reproduce in space? That is, how much does gravity play a factor in reproduction? No experiments have been done to demonstrate this as far as I am aware. Something to think about. It may not be electronics but engineers must surely consider more than their own field of expertise before embarking on spending Billions on space travel.
 

killivolt

Joined Jan 10, 2010
836
As AI and Robotics get more able to serve us, the reality is we just Avatar them as they float through space. If we include a possibility of traveling through or near black holes the Robot do not require any additional equipment to survive the G forces.

kv
 

Aus_DIYer

Joined May 2, 2023
52
As AI and Robotics get more able to serve us, the reality is we just Avatar them as they float through space. If we include a possibility of traveling through or near black holes the Robot do not require any additional equipment to survive the G forces.

kv
Interesting how you can use reality and Avatar in the same sentence. Lol. Robots able to stand the destructive pull of gravity near a black hole? If expanding humanity includes AI and space junk, then we have gone outside our solar system already. I am not a robot and robots are not human.
 

dcbingaman

Joined Jun 30, 2021
1,065
Interesting how you can use reality and Avatar in the same sentence. Lol. Robots able to stand the destructive pull of gravity near a black hole? If expanding humanity includes AI and space junk, then we have gone outside our solar system already. I am not a robot and robots are not human.
Ironically a large black hole has considerably less gravitational tidal forces than a smaller one. The larger one's event horizon is further from the center of the black hole where the radial curvature due to gravity is less. (well that is the theory anyway).
 
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