Is it possible to search in multiple SE forums at once? Could it be arranged to have joint search for Space Exploration and Astronomy default since they overlap a bit?
Earlier this year we released the results of our annual developer survey. With more than 50,000 responses fielded from 173 countries, it was the largest and most comprehensive survey of the programmer workforce that has ever been conducted.
@PearsonArtPhoto yeah, it really has. i have wondered how they got here, i guess mostly from the Hot network. Tons of votes, too. gold badge for the top answer in only 4 days. wild.
@LocalFluff like Antzi said, the only thing right now is to set up search by Google within Stack Exchange through your browser. David Frietag explained it to me once, info at the link: chat.stackexchange.com/transcript/message/25413779#25413779
Huntsville, Barrie, Sudbury, Thunder Bay, etc are trying to get Trans Canada coverage.
They have a grid they are trying to fill out, you can see it as you look at their projections over the years. They are playing strategic Battleship with the US and the interstate system. You always check for a ship in the grid. First one to go off grid and waste a turn aside from sheer luck is going to lose.
You decide on where to start your grid pattern. You start it 4 pegs wide (5 pegs apart). Then you use that to try and find the big ships. Then you fill in the middle to get the 2 peg ship as you get closer, unless you lucjk out earlier.
(We played a LOT of battleship on rainy days at the cottage).
@PearsonArtPhoto I have an idea for a follow up question to my Mars colony one, but I'm not sure if it is answerable. My question is "Which is more efficient in terms of cost versus risk for a Mars colony of the specified size: roads or all terrain rovers?"
I would like informations on the flight controls of the Soyuz spacecraft.
Especially the two control sticks, as shown in this picture (of a Soyuz simulator).
I'm particularly interested by the user interactions.
To my understanding the left one is used to control the attitude of the spacecraft:...
It varies a lot what is available of information on Soviet/Russian tech. Sometimes, you can find nothing at all, sometimes, you find detailed manuals, descriptions and data.
I'm so tired by now of all this "debate" to nowhere in the public space community about where to go and with what rocket and all this with the microgravity, radiation, alien life, uboat group psychology, whatever. Why not once and for all call everyone to a great conference. Give each one a paper an a pencil. And lock the doors!
They're made of metal, so you don't need to worry about them breaking as much.
Anyways, @Hohmannfan, true, it does not really say much about how powerful the forces on the moon will be. But (at least for this model) what we're concerned with is how the surface stresses can result in different features which we observe.
@Phiteros Yes. I suspect what you have calculated is what the force on Charon's surface would have been if it was still a sphere. The number shows that the surface must have changed its shape since that. Under such pressure, it deforms until the pressure reaches zero, or until what the viscosity allows for. From what I remember, Charon's orbit has an extremely low eccentricity, so any tidal stress should be minimal now that is has reached an equilibrium.
Yes, this model is assuming that the satellite is a sphere. But according to Wikipedia: Charon's slow rotation means that there is almost no flattening. Its equatorial and polar radii differ by less than 1%
It is still very nearly spherical. And assuming spherical conditions (and things like a subsurface ocean, which it once may have had), that could result in stresses of that magnitude.
Actually what the heck
This sample file for Charon had the eccentricity set to 0.0022
Well, yes, there are other arguments against a subsurface ocean. There is evidence that it once had an ocean, but it has since cooled and frozen.
From what I'm seeing, the eccentricity could be between 0.003 and 0.008
Though a newer study suggests it is nearly a circular orbit.
This model I am using makes a lot of assumptions, and a lot of the numbers concerning the interior structure are probably off (mostly because we simply do not know what they could be). But I was just surprised at such high values, when most other moons, such as Europa, only have stresses in the range of 50 kPa.
Also a very low inclination to Pluto's equator, and a very low axial tilt. That is almost nothing for tidal force to work with. Tidal stress requires an elliptic orbit, or a rotation other than tidally locked. Once you reach equilibrium, the stress is gone.
I know that. When this reference for Charon was created, I think it was still thought that the eccentricity was around 0.003. That's not a very high eccentricity, but because Charon is so close to Pluto, it results in significant stresses.
I would like informations on the flight controls of the Soyuz spacecraft.
Especially the two control sticks, as shown in this picture (of a Soyuz simulator).
I'm particularly interested by the user interactions.
To my understanding the left one is used to control the attitude of the spacecraft:...
