So, the major issue with settling moon is resource availability: water (!), carbon, fertile soil, and energy.
On the moon you have none of that. Maybe, with a lot of luck, you find water somewhere. Then you need carbon, energy during the long moon nights, and soil that isn't razor sharp particles.
On Mars, you have all of them: low concentrations of water in the atmosphere, carbon from carbon dioxide in the atmosphere, soil that isn't razor sharp (thanks to erosion), and the nights are short enough that you can make it through them.
Yeah I've been thinking about condensing the water out of the air, too. Problem is: how do you do that? If you use chemical dessication agents, then it's effectively the same as if you let the soil absorb the water from the atmosphere. Just that the soil is already there and you don't need to artificially manufacture dessicants. So it's a bit simpler.
All life is based on large quantities of Water. The same will be true on Mars. There has to be a major and reliable source of water on Mars.
What options are there? I read an interesting article yesterday that said "Our results show a two-order-of-magnitude diurnal variation of water vapor pressure, suggesting a strong atmosphere-regolith interchange", in other words, the soil on Mars extracts water out of the atmosphere in the nighttime and releases it in the daytime. This means that if we collect the soil and "bake" it, it would release water vapor in a controlled environment. We could then condense that water vapor to get useful/useable water.
seh' ich nicht so, aber naja, beobachtungen sind verschieden.
thanks, the link is interesting.
The value proposition would be that it is important to understand the exact radiation pattern/schemes if we ever want to routinize spaceflight. In other words: effective solutions (to the problem of radiation) requires detailed knowledge of what the problem actually is, in other words, what kind of radiation are we talking about.
Klare Analysen und sachliche Argumente würden die Rechtspopulisten dumm dastehen lassen. Leider habe ich das Erfahren, dass jeder der gegen Migration ist automatisch (a) als Ausländerfeind und (a.2) als Rassist und (b) als Menschenfeind und Arschloch bevorurteilt wird. Es fällt mir sehr schwer, in dieser ganzen Diskussion jemanden zu finden, der die Argumente sachlich sieht:
- Die Bindung zwischen "Blut und Boden" geht auf die feudale mittelalterliche Bauerngesellschaft zurück, und ist durch jahrtausende (!!!) tief ins soziale Unterbewusstsein eingewandert. Sowas entfernt man nicht durch ein "ja aber die Migranten tun uns doch eh nichts, die sind doch lieb, lernt sie doch einfach einmal kennen". Das verschärft nur die Konflikte, weil der Punkt nicht verstanden wurde. Wenn man anfängt, jahrtausende menschlicher Kultur geringschätzen zu wollen, führt das zu einem Bürgerkrieg.
- die anderen Punkte überlege ich mir später.
Wow, das war echt gut formuliert.
Ich werde darüber nachdenken.
First of all, yes, attempts have been made, but:
- E-Mail is widespread, but not simple. It's quite complicated
- Other messengers often try to simplify the protocol.
Noch ein Problem: Jede Dating-App ist ein "walled garden" - meist gibt es so 3 aktive Teilnehmer je Plattform. Würden die Apps mal zusammenarbeiten/offene Standards definieren, könnte man den Austausch und damit die aktive Mitgliederzahl erhöhen.
There's things that I like about myself that I cannot put into words; it's more a feeling.
Ein durchschnittlicher AfD-Wähler wählt AfD weil er denkt dass Migration das Problem ist (ob das richtig ist oder nicht ist jetzt nicht die Frage). Wenn eine andere Partei, nennen wir sie CxU, Migration zu stoppen verspricht, dann kann der AfD-Wähler immerhin die CxU wählen, was eine Schadensreduzierung um etwa 90% ist, weil wenn die AfD gewählt wird, werden sie nicht nur (vermeintlich) Migration stoppen, sondern auch das Sozialsystem abschaffen, Sicherheiten in der Bevölkerung abbauen, einen haufen "unhinged" Scheiße vorantreiben, usw...
Also ist es doch wohl besser, wenn "die anderen Parteien auch mal versprechen Migration zu stoppen", nicht?
Nebenbei:
Denn die Botschaft, die dadurch gesendet wird ist: “Ok, wir geben es zu, die AfD hat eigentlich recht, und wir versuchen jetzt mal schnell, ihr hinterherzudackeln.”
Nein. Die Botschaft, die dadurch gesendet wird, ist "wir hören euch zu, wir nehmen eure Anliegen ernst" an die Bevölkerung. Das ist doch 'ne gute Sache.
The nazis, too, had a lot of power and yet they lost WW II.
it's called the Paradox Of Tolerance.
Yeah there's actually documentaries about this: like this (it's in german though)
... hearkens back to basic Judeo-Christian values of kindness, human dignity, humility and prosperity.
says the Republican
I was more talking about the quantitative split in Particle Radiation/Electromagnetic Radiation.
Oh yes, of course:
I guess the formula to calculate the momentum p of light is p = E/c where c is the speed of light and E is the energy.
So, if the Energy is 10 MW, or alternatively, 10 MJ/sec, then E = 1e7 J. c = 3e8 m/s. p = E/c = 1e7/3e8 J/(m/s) = 1e7•1e-17/3e8 kg•(m/s)²/(m/s) = 3e-2 kg•(m/s).
(Since E = m•c², 1 kg • c² = 1 kg • (3e8 m/s)² = 1e17 kg•(m/s)².)
Now, if we assume that that momentum gets transferred to the sail, which weighs approximately 20 kg, then we get the velocity of the sail: v = p/20 kg = 3e-2 kg•(m/s)/20 kg ≈ 1e-4 m/s. And this transfer of momentum happens every second, so the acceleration is roughly 1e-4 m/s², or 0.001 m/s².
Hear me out. This thought process requires a bit of knowledge of physics/chemistry.
On the martian poles, there are vast quantities of frozes CO2. This frozen CO2 exerts a certain "vapor pressure" - in other words, a certain partial pressure of gaseous CO2.
Now, if we convert this CO2 into O2 by removing the carbon out of it, the concentration of O2 in the atmosphere increases. And therefore, the concentration (and partial pressure) of CO2 decreases.
But since the frozen CO2 on the poles causes a certain partial pressure of CO2, a bit of the frozen CO2 will go into gaseous phase to refill the CO2 partial pressure.
So, by converting CO2 into O2, the concentration of O2 increases, but the concentration of CO2 stays approximately the same. As such, the total pressure (and density) of the atmosphere increases. This would happen if large-scale biological photosynthesis/growth took place.
Any thoughts?
Hear me out. This thought process requires a bit of knowledge of physics/chemistry.
On the martian poles, there are vast quantities of frozes CO2. This frozen CO2 exerts a certain "vapor pressure" - in other words, a certain partial pressure of gaseous CO2.
Now, if we convert this CO2 into O2 by removing the carbon out of it, the concentration of O2 in the atmosphere increases. And therefore, the concentration (and partial pressure) of CO2 decreases.
But since the frozen CO2 on the poles causes a certain partial pressure of CO2, a bit of the frozen CO2 will go into gaseous phase to refill the CO2 partial pressure.
So, by converting CO2 into O2, the concentration of O2 increases, but the concentration of CO2 stays approximately the same. As such, the total pressure (and density) of the atmosphere increases. This would happen if large-scale biological photosynthesis/growth took place.
Researchers have identified specific materials, including certain plastics, rubber, and synthetic fibers, as well as Martian soil (regolith), which would effectively protect astronauts by blocking harmful space radiation on Mars. These findings could inform the design of protective habitats and spac...
geteilt von: https://programming.dev/post/18559379
> cross-posted from: https://rss.ponder.cat/post/16484
Does anybody have good data on what radiation exists in space?
I have found sporadic information, such as on Wikipedia but I wonder whether there's nicer, clear structured information on this topic?
I just wrote this article and I would like your comment:
The Universe Will Not Die a Heat Death
We assume that the universe is expanding according to the Lambda-CDM model with a fixed Lambda constant.
Imagine a central star, like our sun. Two artificial satellites are orbiting this sun in circular orbits in opposite directions. As the universe expands, the orbits of the satellites are elevated, and the satellites thus gain mechanical energy (the sum of potential and kinetic energy). This energy can be released by causing the satellites to collide or by simply having them graze each other. As a result, some of their kinetic energy is converted into heat, which can be radiated away as thermal radiation, and the satellites descend to lower, more inward orbits. The process can then begin anew.
Hi there, I'd like to connect with people to discuss technical aspects of settlement of mars.
I'd look at a house on earth and ask: what things have to be supplied from the outside; what things can be produced inside the house? Houses on earth have piping for water, and cabling for electricity.
Plants can be grown in a green-house using these two ingredients, and the people can sleep in a spaceship.
Comment whatever comes to your mind.
There is a decentralized YouTube alternative.
Video hosting is notoriously expensive. PeerTube circumvents this problem, because videos aren't stored on some single server, which would cause high bandwidth cost for the server operator, but largely by the users after they watched them, similar to BitTorrent. This way, the cost of video hosting is distributed among the clients, by using their internet connectivity for sharing.
I believe that PeerTube is an interesting project, and I'd ask you to check it out. It's cool.
Similar to Lemmy, it's not a single running server, but rather a software that can be used to set up a server. So there's many instances. I'm still exploring which instances are interesting. If you have any recommendations, I'd like to hear them.
I cannot explain why but I feel that this belongs here.
What is shown is some kind of re-interpretation of the "princess and the pea" saga. Instead of showing the princess' over-sensitivity to small things, it displays the princess' love for plants and nature. In this way, sensitivity is interpreted and seen as something positive, which I can appreciate.
geteilt von: https://lemmy.ml/post/16677826
> Watercolors and colored pencils
Tell your republican friends/colleagues/whatever that solar panels are a good thing because they let Jesus into our lives.
Hopefully that will accelerate the green energy revolution.
