Colonization of Ceres instead of the moon or Mars

[Bill Phil]

5 hours ago, AllenLi said:

Hmmm...

Yeah I agree that asteroids aren’t exactly stable. But excavations are not quite hard:

1. Push the digger in.

2. Dig a tunnel.

3. Throw out the dirt to space.

4. Reinforce the asteroid with steel (for moderate temperatures) or solid water ice (for extremely cold temperatures). Inserting long steel strings right at the “surface” of the tunnel.

Then people can live in the tunnel.

I haven’t learned deep into Physics, so I don’t know about the theory of relativity that well

So with Ceres we basically can dig longer tunnels.

Ceres is also immensely more massive.

It's not stability. It's that asteroids aren't structurally sound. And even if you don't spin the asteroids up you want a rotating habitat of some kind and excavating that material leaves you with a huge amount of stuff that you could build rotating habitats with since it's likely to be denser than the air you fill it with.

[Nuke]

easiest way to build a centrifuge on a low gravity dwarf planet is to use a tunnel boring machine to carve out a circular tunnel and put a train in it.

[kerbiloid]

Edited August 27, 2020 by kerbiloid

[Nightside]

On 8/27/2020 at 8:22 AM, Nuke said:

easiest way to build a centrifuge on a low gravity dwarf planet is to use a tunnel boring machine to carve out a circular tunnel and put a train in it.

That would be really interesting to design. Dwarf planets would seem unlikely to have very strong soil or rock, unless the whole thing is a solid chunk of iron.

You would need to balance the centripetal force created by the train with the weight of the overburden of the soil, which wouldn't be much. 

[Nuke]

3 hours ago, Nightside said:

That would be really interesting to design. Dwarf planets would seem unlikely to have very strong soil or rock, unless the whole thing is a solid chunk of iron.

You would need to balance the centripetal force created by the train with the weight of the overburden of the soil, which wouldn't be much. 

thats the cool thing about tbms, they can lay down reinforcement structures as they tunnel. 

[Nightside]

6 minutes ago, Nuke said:

thats the cool thing about tbms, they can lay down reinforcement structures as they tunnel. 

But Earthly TBMs tend to have decent support from underneath. This would probably be sufficient for supporting the structures own weight, but remember, the train will be exerting force on the ceiling, so the loading will change direction rapidly. 

[Nuke]

5 hours ago, Nightside said:

But Earthly TBMs tend to have decent support from underneath. This would probably be sufficient for supporting the structures own weight, but remember, the train will be exerting force on the ceiling, so the loading will change direction rapidly. 

balance the trains well. as well as keep the ring under tension, like joining tunnel segments on long cables, pre-tensioned and set in place with concrete injection. tension in concert with the balanced trains could keep the flexure to a minimum so as not to disturb the rubble.

[kerbiloid]

Fill the tunnel with a superfluid fluid, make it circulate fastly, and let the cabins float along the loop.

(Though, personally I prefer a carousel, self-adjusting to any gravity from 0 to 1.)

[Nightside]

On 9/4/2020 at 9:42 PM, kerbiloid said:

Fill the tunnel with a superfluid fluid, make it circulate fastly, and let the cabins float along the loop.

(Though, personally I prefer a carousel, self-adjusting to any gravity from 0 to 1.)

So, space submarines then?

[kerbiloid]

1 hour ago, Nightside said:

So, space submarines then?

Subsurfacines? No sea, just surface.

[Nightside]

25 minutes ago, kerbiloid said:

Subsurfacines? No sea, just surface.

Well they are floating upside down in the superfluid.

[kerbiloid]

5 minutes ago, Nightside said:

Well they are floating upside down in the superfluid.

Yes, but "marin-" means "sea".

Are the riverines marines?

Spoiler

 

Btw, there should also be "lakines", "swampines" or "boggines", and sometimes "pipines" (for large pipes).

Edited September 7, 2020 by kerbiloid

[DDE]

On 9/7/2020 at 7:42 AM, kerbiloid said:

Yes, but "marin-" means "sea".

Are the riverines marines?

  Hide contents

 

Btw, there should also be "lakines", "swampines" or "boggines", and sometimes "pipines" (for large pipes).

*laughs in Bolivian Navy*

[kerbiloid]

Btw why do they call the planned desired submersible for Europa "submarine" when it's a "subicine"?

[KerikBalm]

On 8/17/2020 at 8:08 AM, Spacescifi said:

The closest thing we know of that self replicates are tiny blood cells.

They are living things though, 

#1) bacteria are smaller than blood cells, without needing any discussion of viruses or mitochondria/chloroplasts.

#2) the principle cells of blood (hemocytes, responsible for oxygen transportation) cannot replicate, but immune cells in the blood ca

Where did you go to school anyway? Seems like they failed you.

On 8/24/2020 at 7:19 PM, Spacescifi said:

I once toyed with a scifi idea of fictional engineered metal that could absorb a ton of liquid hydrogen per cubic inch.

 

  Reveal hidden contents

https://www.daviddarling.info/encyclopedia/D/diametric_drive.html

 

By sci fi, you mean fantasy, but in space?