We need to prepare for our site to enter public beta, and one of the things we need to do is define what goes in the help center and the tour. This is one of The 7 Essential Meta Questions of Every Beta.
Here's what the 7 Essential Questions page says about creating documentation:
Much of th...
@DonyorM Changes look ok, I think the list is too short with each entry covering too many things now but it's still an improvement over how it did look
Life on Earth is protected by Earth's magnetic field, which deflects high energy charged particles that arrive from the sun and from outside the solar system. This prevents damage to organisms.
For a habitat in orbit around the sun, how much energy would be required to generate a magnetic field ...
@TimB since we're working on the scope of the site I deliberately posted a question that I thought would be a better fit for physics.se, to see how the community judges such questions. I'd like to see it fit here but what's most important is finding out where the lines will lie. I'm trying to think of more areas where we need such decisions too.
I think it's a solid fit for worldbuilding, it's clearly on topic
the question is whether you would get a better/more informed result on physics
I know the relevant theory (i.e. I can tell you that what you are proposing is valid as a concept) but don't know it enough to do the maths and see whether the numbers work out (i.e. can you generate a field strong enough)
my gut feeling is that you wouldn't be able to generate a strong enough magnetic field
with a reasonable amount of solar power
but I've no evidence to back that up so I hope someone does come in with the answer :)
It is possible to migrate a question from one Stack Exchange site to another by closing, but if I have a question that I think is on-topic for multiple Stack Exchange sites, is it OK to post it on both (multipost)?
For example, I have a question that's earned me the tumbleweed badge on SO and I...
@Mourdos that's the post I was thinking of - it recommends against multi-posting of the same question to multiple stack exchange sites, and has plenty of upvotes.
@MichaelKjörling - always OK to ask and even more so in a private beta. No that wasn't me - I only had one improvement suggestion and that turned out to be something I'd overlooked, and not a problem with the question at all... I think it's important to close vote where necessary, but I see nothing wrong with that question.
@MichaelKjörling yes I know - I have closed some... :)
I was wondering myself why there was a close vote. The lack of a reason or any improvement suggestions is annoying, particularly when we're looking to define the scope as well as possible before public beta.
@githubphagocyte Yes, that's why I posted my meta question about the shapeshifters question, too. It seems that since then the close voting on that has stopped, though.
I don't mind if a question of mine gets closed, but I want both for myself and for the site and community as a whole to understand why it gets closed.
Yes, commenting along with voting to close would be a good thing. At least giving some sort of explanation for the vote. Sometimes it's quite easy to address things, if one only gets them pointed out. (It isn't always easy to see the problems with one's question oneself!)
This answer starts out basically saying it is highly speculative, but then goes on to be almost worse than that. The bullet lists at the beginning appear reasonable but it's largely downhill from there IMO...
Assumptions:
They have evolved to an intellegence/technology level simular to our own.
They have a lack of resources that need to be managed just like the real world.
They want the species to evolve/survive.
They take some time to reach maturity.
They are mostly like us but with the one differe...
And I can't help but feel that a species which takes some time to reach maturity (for a reasonable definition of "some time") wouldn't evolve like that, but that's a different matter.
I am thinking about answering that question, but species evolve to have lots of children when there are predators requiring them to use a shotgun approach to child rearing by spitting out as many as possible. Also, with that kind of birthing model, children come out relatively self sufficient, preventing large, mammalians from using this birthing method.
Otherwise, it's just a caret which means very close to nothing. It doesn't even mean "I agree". (It does, however, mean exponentiation. In some contexts.)
@Vulcronos There's a reason why even, say, rabbits and mice nurture their young.
True. I am just used to game chats where there isn't a reply feature. You just use ^ to agree with the previous post. This is the first stack exchange chat I have joined so I'll learn the ropes eventually
You don't have to use the reply feature if it's clear what you are saying and what the context of what you are saying is. In this case (in my mind) it was neither. Even "I agree" would have been much better as it actually says something.
(If nothing has been posted in an hour or two, then someone posts something and another user says "I agree" very soon after with no other references, I think it would be safe enough to assume that the agreement is with what was most recently posted. In a fast-flowing discussion or if for some other reason there is reason to fear a mix-up, you probably want to be more explicit.)
I don't recall the particulars very well (this was a documentary I saw probably ten years ago, but it's stuck in the back of my mind) but from what I recall, solar CMEs were given as one reason why the crew would need to "evacuate" to a smaller, heavily shielded portion of the spacecraft. Like I said it doesn't invalidate the point that you can use metal shielding, but such heavy shielding costs a lot to get into space and accellerate to meaningful speeds.
The question seems to be "For a habitat in orbit around the sun, how much energy would be required to generate a magnetic field providing sufficient protection for the inhabitants (humans, animals, plants) from direct damage from charged particles?"
Note "charged particles" == primarily CMEs (and to a lesser extent solar wind).
Either way, the more I think about it, the more I think that question would be a much better fit for a site like Physics or maybe Space Exploration, because it's absolutely answerable within the context of our world (if you just remove the fictional elements and keep the core question) and experts there would be more likely to be able to give a good answer.
Just because a question comes up during worldbuilding doesn't automatically make the Worldbuilding SE the best place to ask.
Speaking hypothetically now, if I was a moderator on WB SE, now is when I'd likely be conferring with the Physics moderators on whether the question could be made to fit on their site. Because I feel a physics expert (or possibly someone well versed in the subject of space exploration) would be more likely to be able to provide a really great answer.
The question comes down to two things, really: how strong a magnetic field would be needed to deflect charged particles outside of Earth's magnetic field (down to a safe level, at least), and how much power would be needed to generate such a field. Those are, at the core, physics questions. Next step is simply figuring out what power density you have to play with (W/m²) and what that means in terms of solar panel size.
This answer starts out basically saying it is highly speculative, but then goes on to be almost worse than that. The bullet lists at the beginning appear reasonable but it's largely downhill from there IMO...
Yeah, he drew a lot of conclusions without really showing the reasoning behind the conclusions
i.e. no "back it up"
I just commented
Hi, this is all good stuff but I think we could do with more "back it up". I know in a speculative answer like this we can't really prove anything but it would be nice to see more detail of the reasoning behind each conclusion here.
Ahh, the new answer seems more solidly grounded...nice stuff