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#1201 Re: Not So Free Chat » Race and Culture - A Changing Europe - Opening a mighty can of worms... » 2005-02-25 04:18:33

Globalisation is just a consequence of our advanced technology allowing ideas and people to flow from point to point easily. But with it comes buisness and its ability to purchase and control economies.

It is just growth where a company has reached its capacity in one country it can start subsidaries in others. Especially when we have one major superpower and it has a very high standard of living. The people want what the USA has and so companies provide.

There is a hatred for Globalisation and though the USA did not create the idea (it was the British) it is the USA that gets the blame. Though it really is all countries that do it, no country is an Island anymore.

#1202 Re: Human missions » Delta IV Heavy and Beyond » 2005-02-25 03:44:40

Bet you though that any SDV will keep for the most part the standing army that the shuttle has. It may well be the cheapest to actually design and build but I wonder if over time it becomes the more expensive option.

Still with an SDV we will get a decent quaranteed throw weight designed straight into the vehicle rather than have to rely on simply putting more and more booster side by side and adding SRBs to get the same capacity. As the more you attach to a basic vehicle like Atlas or Delta just increases the possibility of a failure in one segment so destroying a whole mission.

Id much prefer a clean sheet HLV but I can quarantee it wont happen.

#1203 Re: Terraformation » Mars Needs Nitrogen » 2005-02-24 18:15:38

Grypd,

Bacteria will be able to fix the current nitrogen levels  with plants on a warm wet mars, it might require a genetic boost to the nitrogen fixing family of bacteria to make it work well on mars.

I might be wrong here but i believe for combustion of 02 we need an atmosphere at 34% 02.
Probably not a big worry we would ever convert that much c02 into c and o2 on mars.

Actually the atmosphere we have has an oxygen atmosphere of 21% every percent over that is an increasing risk of fire. By the time we reach an atmosphere content of 30% a fire will be so hard to fight that it will be a knightmare.

We have to remember that fires on Earth is what is one of the main means the planet has for keeping the oxygen atmosphere we breathe at its level. It also helps produce the Ozone that protects us. But on a Mars where we are not breathing and consuming the oxygen that is converted by plantlife will allow oxygen levels to rise quickly. It will come down when we have fires but will get up again very quickly. This means that we will find fires being an incredible risk to the population we have on Mars.

The best way would be to have an atmosphere similar to Earths even if of a lower pressure as we can introduce wildlife that will like us remove the excess oxygen and create a reasonable balance. Nitrogen is the key, it being a neutral gas is simply essential to allow us to have a proper biosphere.

#1204 Re: Not So Free Chat » Apropos of Nothing *4* » 2005-02-24 12:27:48

I just had the misfortune of attending a company meeting the sole purpose of which seems to have been to discuss the new procedure for having meetings.
roll

Ah the benefit of modern civilisation, RED TAPE big_smile

So that explains your wish to go to Mars a secret love of all things red cool

#1205 Re: Terraformation » Mars Needs Nitrogen » 2005-02-24 11:22:24

The reason people want Nitrogen is that it is an inert gas. If we succeed in terraforming we will have an increased atmosphere but if it is just CO2 then the plants we use will break it down into oxygen. It will still mean we cant breathe the atmosphere as there is too much CO2 but it also means we are at real risk of fire as Oxygen concentrations if too high create a real risk of uncontrollable blazes.

#1206 Re: Human missions » New Space Shuttle » 2005-02-24 11:16:20

Seems NASA is now looking for a more cheaper option for its flights to the ISS and into LEO.
http://www.space-travel.com/news/rlv-05a.html]Spacerace 2

Still for any TSTO RLV to make a real commercial reason for existence it must have a place to go. But frankly I find that the ISS will not require such a creation. Still hopefully in the future with the increased launches of people needed a decision to build such a spaceplane will come.

#1207 Re: Science, Technology, and Astronomy » Ancient Nuclear Reactors » 2005-02-24 03:29:53

There is also like what occurred on the Moon due high heat natural deposits of Uranium rich minerals can be deposited when combined with significant impact events.

As an example the mineral KREEP is commen in the Mare Imbrium rim and other mares due to this having floated up during there creation. These are very important for us elements.

#1208 Re: Human missions » New Space Shuttle » 2005-02-23 18:31:55

So for a spaceplane idea how about this
http://www.bristolspaceplanes.com/proje … l]Spacecab

Still will anyone put the cash to develop such a plane especially as there will still be a need for a heavy launch cpacity that TSTO spaceplanes just cannot deal with.

#1209 Re: Terraformation » Mars Needs Nitrogen » 2005-02-23 18:24:20

Then we must consider going to the Gas giants to get our Nitrogen. We allways did plan to do it to collect the helium3 to use as a fusion fuel and going to the outer two was seen as the best option for reasons to do with there lesser gravity wells and reduced background radiation.

But for our purposes Neptune would now be a better choice to go to. Triton one of the Moons of Neptune has volcanic geysers of nitrogen and is thought to have a solid crust of both water ice and nitrogen ice. And with a suface gravity much less than even our Moons it makes for a better source of launching materials by a mass driver.

#1210 Re: Science, Technology, and Astronomy » Oceanic Exploration:  A Revolution - ::Aquanauts:: » 2005-02-23 18:06:31

Seen a programme on discovery tonight about a cowboy from texas who has got a british firm to make a submarine for him so he can take tourists down and see wrecks.

Apparently like yachts and powerboats no one needs a license to drive a submarine. And since this submarine is using modern materials and benefitting from some now very cheap items (fork lift batteries for power etc) it really could become a very popular pastime.

Still there has been a general revelution in underwater technology and with systems like deepflight showing what could be done I can see someone trying to create an underwater settlement sooner rather than later. Especially with a general reduction in prices for things like steelwork to allow for large structures to be made.

#1211 Re: Not So Free Chat » Apropos of Nothing *4* » 2005-02-23 17:59:05

*Thanks Grypd and Shaun.  Your cat sounds like a super-feline, Grypd.  Looking at sheep in a predatory way?  I can imagine your neighbors' reaction upon returning home.  Hopefully they were good sports about it.

Actually it might be parentage, we know who his mother was but his father could easily have been from the native wildcat population. Happens a lot round here, and the only real way to tell the difference is by blood sample.

Even named him Fitz to refer to his errr lack of legitimate fatherhood. And frankly he has a bit of an attitude.

Still I have to agree looking up and really wishing we could....just....maybe one day :hm:

#1212 Re: Human missions » Mars On Earthpolitician  Against SpaceExploration - Mars On Earth » 2005-02-23 05:16:39

There is a Scottish lawyer who put a claim to the Sun as no one else had and we now all owe him a few billion years of energy charges. He did it to show the stupidity of the current laws dealing with extra terrestrial property.

The idea that anyone can claim large parts of the Moon or Mars without actually being there is anathema to me and it wont be until someone actually does go that it will be shown as a very stupid gift fad. Especially as the first nation that goes there will simply ignore any such claim as a worthless piece of paper.

There is an organisation called the Lunar republic that actually intends to go to the moon by selling land there.
http://www.lunarrepublic.com/]Lunar Republic

The only way to stop these ridiculous claims and actually interest buisness and Nations to go out there is to have an outer space treaty where all nations are signatory that gives legal protection to peoples claims as long as they are being "worked" and allowing them to use materials so gleaned and to be able to get a profit for them or to not have to pay every other country a share for its use.

#1213 Re: Not So Free Chat » Apropos of Nothing *4* » 2005-02-23 05:01:02

If its any help one of my cats(I have two) managed to get himself locked into a neighbours house as they left to go on Holiday. We really thought we had lost him, either to accident, fox or simply him deciding to go feral.

When the neighbours came back they found he had helped himself to their cupboards and had even opened the fridge!!! I didnt have the gall to ask did he help himself to any beer as well.

He was fine, then again he is one of the best hunters I have ever seen in cats. I have seen him take Rabbits and actually crows. And I have seen him staring at sheep probably wondering how he is going to get one of those over the fence and then home.

#1214 Re: Terraformation » Mars Needs Nitrogen » 2005-02-23 04:45:42

Then it really comes down to if Mars does not have enough we will have to find it and then deliver it.

This is frankly a horrendously expensive proposal but if it is the only choice then it will just have to be. It can be done if it is considered an over time event with Mass packets of nitrogen ice fired to Mars every couple of weeks.

One advantage of crashing regular consignments of nitrogen ice onto Mars will be it will create heat, another bonus for terraforming.

#1215 Re: Science, Technology, and Astronomy » Rotundus Robot » 2005-02-20 13:44:51

The Ministery of Defence in the Uk have a Robot for surveilance and security it is designed to similate a snake and can take damage and the "snake" can simply ignore the damaged region. it is planed to be deployed in 2006.

As snake type robots are very easy technically to make it seems that BEAM types will be used in combat etc.

#1216 Re: Human missions » .Colonizing Mars and the Asteroid Belt - Mars and Asteroids andPossiblecollisions » 2005-02-20 10:16:36

Feeding and supplying the people who go to Mars is the point. We will need to develop the Infrastructure for these people and that means a large amount of Greenhouses and developing plants that are resistant to the radiation that Mars has and also thrive in poor light conditions. Other problems consist of how do we get enough energy to crack the soil to get the oxygen we need. You see power supply is a problem as well Mars gets a lot less sunlight as it is further away so we will need Nuclear or Fusion if developed to power the Bases.

And infrastructure is the point we can build it as long as we have materials and we have people to run it. So now we need people to build and make things or at the least control the hordes of robots doing the jobs.

Still it will need a lot of people to terraform a planet and we are talking tens of thousands. And until they are in place there will not be any terraforming.

#1217 Re: Terraformation » Mars Needs Nitrogen » 2005-02-20 09:46:47

There is a severe shortage of nitrogen on Mars. And as for bird Guano it is just atmospheric nitrogen concentrated. At one time quano was so expensive a good site for it was actually worth more than a Gold mine.

And since atmospheric quano is not present on Mars where else are you going to get it

big_smile

#1218 Re: Human missions » .Colonizing Mars and the Asteroid Belt - Mars and Asteroids andPossiblecollisions » 2005-02-20 09:42:35

Martian Republic:  You say a fusion/helium/hydrogen powered space ship will be able to go from the earth to mars in one week?  And we can probably develop the technology and build the infrastructure in space in only twenty or even forty years?

It's very likely that we won't even have fusion figured out in forty years!

How about we take our time, conduct science, experiment, learn, not break the bank, explore mars first, build a small base permanently manned with less than 10 crew, begin terraforming, make sure we are doing things the right way, then move in plants, then small animals, and finally way down the road when there is an oxygen atmosphere we can begin landing 10-20 settlers every few months. 

That's the smart way.  No crazy trips to asteroids.  No massive expenditures that ruin our childrens future.  And no star trek warp drive needed.

Dook it will be hundreds of years before there is an atmosphere that is breathable on Mars. If you dont want to start manned colonisation till then I can truly say that you will find it full of other countries settlers. And with a colonisation rate of only 10 to 20 people a year it frantically is not worth it. At that rate deaths by natural causes will cause your colony to fold.

In fact using the dictionary what you describe is not colonisation but settlement. Colonisation refers to large scale movement of people settlement is more appropiate for the numbers you wish to move.

#1219 Re: Human missions » .Colonizing Mars and the Asteroid Belt - Mars and Asteroids andPossiblecollisions » 2005-02-20 06:50:11

Processed?  You mean, melted.  So you are saying it's easier to have a ship go from mars all the way out to the asteroid belt, land, fill up with asteroid water, fly back, then I assume it just dumps the water onto mars from orbit?  I fail to see how that's efficient or easier.

We won't need asteroid anything, EVER!  The only reason we should ever go there is for science.

You believe we will use asteroidal water to terraform Mars when it has a lot more use as fuel.

The problem with both Earth and Mars is that they have gravity and an atmosphere. To provide fuel for the craft that ply the distances between needs tons at a time and at present launch prices of 1000$us a pound it is just too expensive. But with the asteroids we can simply send a craft to them it gets its own tanks topped up and fills up its hold and then goes to Mars or Earth and supplies the craft that travel between.

If there is a sudden need for more water on Mars to terraform it then its a good thing we have the Kuiper belt. Then we simply can put an engine on this either nuclear or mass driver and send it into our system to collide with Mars in a non habitated spot. Will take years to do it then but then again it will take at least a 1000 to terraform Mars.

And there is plenty to find in the Asteroids, dont worry we will go and we will do it to enrich ourselves.

#1220 Re: Human missions » .Colonizing Mars and the Asteroid Belt - Mars and Asteroids andPossiblecollisions » 2005-02-19 18:10:51

You're saying use some kind of cycler ship to bring resources (water) from the asteroid belt back to the earth.  Maybe one of our orbit specialists can tell us if there even is such a thing as a cycler orbit between the two.

Dook do you even know that Asteroids form into classes and these classes are based where they roughly can be found in the solar system. A cycler orbit is where we use as limited amount of power as possible to increase fuel efficiency. The use of cyclers was proposed by even the likes of Buzz Aldrin to allow efficient transport between the Earth and Mars for this to work you have to actually enter the asteroid belt. But we dont need cyclers to get resources from the asteroids but we do need is fuel. And we can get it from the asteroids.

http://www.spacer.com/news/tourism-02b.html]Cyclers as proposed by Buzz Aldrin

Buzz Aldrins proposal on cyclers.

But are we running out of water on the Earth? It seems to me that we have plenty. And mars seems to have a great deal of it so again...why go to the asteroids?

Where is this water? Easy its on the planet so is it useful to provide fuel for spacecraft oh thats easy, No.
it is only useful when you can get it to the spacecraft and at over 1000$ US dollars a pound then it frankly is too expensive. And to get it from Mars costs a lot more it has the added pain of needing it to be processed. And a Nuclear Rocket the best power source we have at present for any decent powered manned craft would need a lot of it tons actually. So if we can get it from the asteroids and those dark regions of the Moon then we have a lot  more cheaper spaceflight and a chance to get to Mars sooner. A rocket must carry ALL its fuel up with it may need and any capacity left is what we call the payload. In space as we are not fighting atmosphere and as strong gravity forces we can get a lot more out of a pound of fuel. So fuel from Asteroids/Moon is a very very attractive idea in fact it is the only way to go.

70 trillion people in the asteroid belt. You just want more people, is that it? You want more humans in existence? It doesnt matter what their qualitity of life is or where they are as long as they are.

People need a space to grow and be able to have children and live in an enviroment that is a great place to live where there medical needs and all reasonable needs are met. Like most western countries are now. So on Earth there is just not enough resources to go around unless the western countries take a severe cut in there lifestyles. And even then its a dicey thing. No what I want is for everyone to be able to live as lords and enjoy all the benefits that Science and medicine are able to give and have children in the security that they will not starve to death or have to sell themselves to get a little food in for there pain and diseased wracked bodies.

Like we are competing with some alien race as to who has the most people. There couldn't possibly be a reason to have that many humans in the asteroid belt.  Why would anyone move their family from the earth or a terraformed mars into a cylinder?

Ah but if you read my post you will note I said there is cpacity for 70 Trillion people to be kept in very very good lifestyles, not that there will ever be that many people but then again im not a psychic so who knows. And so who is going to terraform Mars, People. How are they going to get there, Cylinders (with engines). What are they going to live in when they get there. Habitats (read cylinders).
But what is proposed for space colonies is actually a better place to live than Mars it will have Earth standard Gravity and atmosphere and a lot of room. It will have good food and unlimited resources and power and complete radiation protection. Now I have a question for you Dook if the Asteroids give this why should we send people to Mars where they would be living in the modern equivalent of slums for space and with a lot of things affecting them. And it will take at least a 1000 years for us to Terraform Mars. So why colonise Mars if we use your arquements Dook ???

#1221 Re: Human missions » .Colonizing Mars and the Asteroid Belt - Mars and Asteroids andPossiblecollisions » 2005-02-19 14:44:54

I think in the very distant future we will have a couple of stations in orbit, probably one each at the earth/moon lagrange points (L1 and L2).  I'd expect the stations to be a spinning circular ring with many levels and tubes running to ship hangars at the center.  I don't expect much of a base on the moon at all, maybe if we really come up with a need for helium-3 but other than that even in the future no one would want to leave the earth and live their life in a box, maybe for a lot of money and only for a short time. 

About this time we might have a completely terraformed mars and ships would travel back and forth between the earth and mars.  Mars would need to have one space station in orbit to service arriving and departing ships but I still see no reason for asteroid mining.

What will you terraform mars with if not material from the asteroid belts. Remember Phobos and Deimos are just captured asteroids.

How will we create these ships to go between Mars and Earth. How will we make our spacestations.

So you think people in space will be in a box but they will be living in large O'Neill type colonies. Strange that ???

Asteroidal and lunar material will be needed for us to build anything of any substantial size in space. We either go that way or wait for someone to invent antigravity. Even then it only will increase the likehood of people staying in space as they will no longer need to spin habitats as they will be able to control gravity.

#1222 Re: Human missions » .Colonizing Mars and the Asteroid Belt - Mars and Asteroids andPossiblecollisions » 2005-02-19 14:39:04

Whatever propulsion you use to make the round trip to the asteroid belt negates the benefit of whatever it is you try to bring back.  You use more resources than you gain.  Now you can use up martian hydrogen as fuel to go out and get heavy metal asteroids but when do we really think this is going to be necessary?  All of this talk about mars running out of resources and leaving the earth to colonize space is so far in the future that it's pointless to even discuss at this time.  If we ever do it the technology used will be far beyond our current understanding of physics.

And to Martian Republic:  A million people living in the asteroid belt?  That is complete nonsense.

Dook the benefit you gain by utilising asteroidal water as a fuel source is that you can send a tanker to a fuel stop fill up its fuel tanks and carry enough back to Earth to do the same mission 12 times. Soon we have a lot of fuel for other purposes in usable areas and a means to start collecting asteroidal materials for other purposes like building and or missions to Mars.

And Dook if they go the way of space colonies like oNeill cylinders etc then it wont be 1 million it will be 70 trillion people that can live very well on materials available in the asteroids.

#1223 Re: Human missions » .Colonizing Mars and the Asteroid Belt - Mars and Asteroids andPossiblecollisions » 2005-02-19 10:15:39

A true space civilization?  What is with this crazy idea that we have to abandon the earth?  This is it.  The earth is where we were planted, where we grew, other than mars there is nothing else within possibility for settlement.

A true space civilisation is where we are able to enter space and use its resources as we so desire. Who said anything about abandoning the Earth.

Mars is not as hospitable as the Earth but we still want to go there. We will have to live in Habitats until we actually change the whole planet so that it is not as dangerous to us as it currently is. But to that we need a lot of spacebourne resources. And we will need those resources to be able to move enough people to actually Colonize that Planet.

Space? You think masses of people are just going to abandon the Earth and live in a ship in space? Why would anyone want to do such a thing?

People will go where they want to if given a chance. But to be able to be given that chance we need a means to do so. But just using the Earth to launch all that we need is frankly too expensive. We need the resources of space to be able to do this.

And one question why did people leave there well known European existence to go and colonize the Americas. Frankly many reasons and so will it be for space.

Also manned exploration of even our solar system is going to take a Star Trek type propulsion system which is about 1,000 years if it's possible at all.

No what it needs is a nuclear powered engine or even if we can get it a fusion powered one. But we already have the nuclear one now actually we had it in the 1960s. Its not a case of new propulsion types but of fuel that is limiting our expansion into space. But as you have already noted 75% of all asteroids are chondrite classes and these are made up of between 20% to 80% water or similar. We can use those as fuel stations and so go where we need to. If we have Star Treks anti gravity then it would be easy to send things from Earth up and vice versa but we dont. So we have to use the only sensible recourse we use the materials already present. Zubrins Mars Direct already does. It is just a matter of doing the same elsewhere too.

#1224 Re: Civilization and Culture » Attire - -or-:  What to wear on Mars, baby! » 2005-02-19 07:20:32

Still with skinsuits they would have to be made of some really strong but still flexible material. But then again I would prefer something a wee bit more defensive a bit of armor or something to ensure im a lot more protected from falls etc.

#1225 Re: Human missions » .Colonizing Mars and the Asteroid Belt - Mars and Asteroids andPossiblecollisions » 2005-02-19 07:02:35

So there is a lot of metal out there.  It's still WAY OUT THERE!  Are we in danger of running out of iron on the earth?  With current production and increased recycling we shouldn't have a problem for a very long time, if ever.

Is mars in danger of running out of iron at any time in the next thousand years?

Dook you assume we will go to the asteroids for there iron, Hardly, to the asteroid miner there are a lot more interesting materials to be found like all the platinum group metals, Titanium etc all of which can be found in very heavy concentrations.

But what really will open up space is to be able to use those 75% of Chondrite class of asteroids. There water and hydrocarbons will be able supply the fuel and furnish the ships that create a true space civilisation. And incidentally it will also allow us to be able to transport a lot of people to Mars.

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