insane_alien Posted February 11, 2007 Share Posted February 11, 2007 okay, jacques, you cannot land on the sun, there are more than a few reasons for it. 1. its damn hot 2. there is no surface to land on 3. its really damn hot 4. it actually takes a hell of a lot of energy to get there. its more difficult to get to the sun than pluto 5. we don't have any rockets with enough power to land on the sun even if there hypothetically was a surface. Link to comment Share on other sites More sharing options...
YT2095 Posted February 11, 2007 Share Posted February 11, 2007 you really have No Vision at all do you, you do the Mining at Night! problem solved. Link to comment Share on other sites More sharing options...
Jacquesl Posted February 11, 2007 Author Share Posted February 11, 2007 okay, jacques, you cannot land on the sun, Your dam right Link to comment Share on other sites More sharing options...
Norman Albers Posted February 11, 2007 Share Posted February 11, 2007 you really have No Vision at all do you, you do the Mining at Night!problem solved. NASA needs this brilliance. Link to comment Share on other sites More sharing options...
YT2095 Posted February 11, 2007 Share Posted February 11, 2007 One endevours to do Ones best Link to comment Share on other sites More sharing options...
ydoaPs Posted February 11, 2007 Share Posted February 11, 2007 4. it actually takes a hell of a lot of energy to get there. its more difficult to get to the sun than plutoIt is? I thought it would be easier. It is far closer and you only really have to get yourself halfway and let gravity take over. Link to comment Share on other sites More sharing options...
YT2095 Posted February 11, 2007 Share Posted February 11, 2007 less than halfway actualy. Pluto would be Much harder. Link to comment Share on other sites More sharing options...
Norman Albers Posted February 11, 2007 Share Posted February 11, 2007 I am writing a swing jazz song, "Between Here and the Moon", where "my love" and I go build our cocoon, presumably at the Lagrangian point, between here and the moon. Lyrics inspired by Wendell Wilson. I have a decent bridge, but welcome help trying to rhyme Lagrangian(???): "We'll head to the moon in summer, and chill out in the shade. Then back for Southern winters; then we'll have it made. We'll take along some tanks of air, so we have some to breath. Coming back, we'll take a pack, of some of that green cheese!" Link to comment Share on other sites More sharing options...
YT2095 Posted February 11, 2007 Share Posted February 11, 2007 well it`s exactly the Lagrangian point that would be closer to Terra than Sol, a fraction beyond that, it`s a Free Ride here to Pluto however.... LOL Link to comment Share on other sites More sharing options...
Jacquesl Posted February 11, 2007 Author Share Posted February 11, 2007 I wonder what will happen to a human, if your living on Jupiter and if there was oxygen and water and all the stuff, and just remember that Jupiter have a Equatorial diameter of 11.21 and the earth 1, it’s probably in ratio’s. Will we become 11.21 time bigger?? We wont be able to walk or move on it, your going to Wight 11.21 times more, if your living on the sun, you have a problem with your bones. insane_alien that hydrogen mine idea might work on Jupiter to Neptune and you'll also have some Helium to lift of that planet with some garbage bin bags, just imagine it, lol. Link to comment Share on other sites More sharing options...
Jacquesl Posted February 11, 2007 Author Share Posted February 11, 2007 Now you’ll find a way to make oxygen Venus Atmosphere have CO2, N2, let’s ships some trees and plants. Let’s convert some CO2 to Oxygen and Carbon and that Nitrogen, if I’m right, plants like that to. Or we can make some nitrous oxide (N2O) as a fuel Link to comment Share on other sites More sharing options...
Norman Albers Posted February 11, 2007 Share Posted February 11, 2007 Gravitational field strength depends on your radius from the center of a spherical mass, and also on the total mass inside of your radius. Look up the equation. Link to comment Share on other sites More sharing options...
YT2095 Posted February 11, 2007 Share Posted February 11, 2007 I wonder what will happen to a human, if your living on Jupiter and ... you`de get squashed. Link to comment Share on other sites More sharing options...
insane_alien Posted February 11, 2007 Share Posted February 11, 2007 It is? I thought it would be easier. It is far closer and you only really have to get yourself halfway and let gravity take over. You would think that wouldn't you. okay, first of all, assuming that the spacecraft is in orbit around the sun (like the earth, we're just ignoring it for simplicity) it requires less of a change in energy to move an orbit out than it does to move it in closer, look at a potential energy diagram and you'll see this. This means that it requires more energy to land on the sun than it does to get to pluto. and then you have to slow down to land. thats a whole 273 km/s delta-V right there, thats going to need a few big rockets. for pluto it would only be a few km/s which is very achievable. If you add in the earth then you add on about the same energy for each one. look up hohmann tranfers as well. Link to comment Share on other sites More sharing options...
YT2095 Posted February 11, 2007 Share Posted February 11, 2007 This means that it requires more energy to land on the sun ... I thought you said we can`t land on the Sun? Link to comment Share on other sites More sharing options...
Norman Albers Posted February 11, 2007 Share Posted February 11, 2007 I guess YT is correct. Looking up masses of Earth and Jupiter, and using your ratio of 11.2, I calculate a weight ratio of about 3.5. Not a good place for a green cheese picnic. Link to comment Share on other sites More sharing options...
insane_alien Posted February 11, 2007 Share Posted February 11, 2007 I thought you said we can`t land on the Sun? i also said if there, hypothetically, was a surface to land on. its still going to take more energy to get there. Link to comment Share on other sites More sharing options...
YT2095 Posted February 11, 2007 Share Posted February 11, 2007 I still totaly disagree, why else would comets and even planets orbit a sun if it didn`t have a greater attractive power? Hell, the Sun and Moon make Tides here! you could turn the engines off way before mid distance and coast the rest of the way Link to comment Share on other sites More sharing options...
Norman Albers Posted February 11, 2007 Share Posted February 11, 2007 As a sophomore I had the opportunity to be a research assistant on a NASA contract with a cool prof., who taught me what I needed to know about numerical analysis and fourth-order Runge-Kutta integrations. Our task then, in about 1968, was to optimize the trajectory from "here to a far planet", given a low-thrust (ion-type that we now have) propulsion. The endpoint issues of earth escape and, say, orbit insertion at Jupiter, were separate from the larger scale issue of being in one orbit around the sun, and then getting yourself to a farther one. This is treated entirely as a heliocentric problem because you are quickly away from Earth's field, compared with that of the sun. One constructed a state vector of six components, position and velocity, and marched this along. Amazingly, you can construct a Hamiltonian scalar function which starts positive, then dips negative, then comes back positive. The negative regime is when you turn the engine off and drift, for the optimal solution. This was variational analysis. (Thanks YT, I want to look up the variational or minimization math again to see why that works. Seems magic.) Link to comment Share on other sites More sharing options...
YT2095 Posted February 11, 2007 Share Posted February 11, 2007 Sweet! Link to comment Share on other sites More sharing options...
JohnB Posted February 12, 2007 Share Posted February 12, 2007 Um, sorry to rain on the parade re the OP, but cold fusion does actually exist. It's useless for generating power but it exists. This thread was for the top physics stories of 2005. Which led to this article. It's called "Pyrofusion". This thread is still in the correct forum though. Link to comment Share on other sites More sharing options...
Jacquesl Posted February 12, 2007 Author Share Posted February 12, 2007 Yip, on NJL website he did a cold fusion experiment produced something like a +- 40% on more energy return, but the inputs then starts with kW’s JohnB do you by any change know of a good way to generate electricity from cheap clean fuels? Link to comment Share on other sites More sharing options...
swansont Posted February 12, 2007 Share Posted February 12, 2007 Um, sorry to rain on the parade re the OP, but cold fusion does actually exist. It's useless for generating power but it exists. This thread was for the top physics stories of 2005. Which led to this article. It's called "Pyrofusion". This thread is still in the correct forum though. The context, however, is fusion to produce power. Pyrofusion was not intended for such a purpose. Fusion happens all the time in particle accelerators. Link to comment Share on other sites More sharing options...
Norman Albers Posted February 12, 2007 Share Posted February 12, 2007 Yah, pyrofusion gets a "few" nuclei accelerated. Those numbers leave us eleven magnitudes shy of heating a cup of coffee, though we can count on three magnitudes' of improvement. I worked toward controlled fusion in my master's degree so I am rooting for it, and people do mess around with cold fusion. The joke goes that fusion is the energy source of the future and always will be. An interesting comparison would be between pyrofusion and plasma "tabletop" accelerators. Link to comment Share on other sites More sharing options...
Jacquesl Posted February 12, 2007 Author Share Posted February 12, 2007 fusion is the energy source of the future and always will be Ohhh boy, your 100% correct there Norman Alber, just until that oil dries out, then we will probably have some balance with some monopoly games in governments. Then everyone’s going to make there own bio-diesel and bio-fuel and use some homemade Ethanol for there cars or generators, and then I’m going to get a heavy duty laugh attack and a shit attack. But that nuclear will be required to power town and city’s with some efficient house equipment, that energy saving 12W bulbs. Norman Alber do you know of any possibilities on making a cheap, easy and effective homemade fission or fusion device. And like I’ve seen on my treads, people DON’T like that water cars and 120W to 15000W stuff. Because it doest sounds logical and probably will not work. We’ll need some easy available fuel besides U and Po. Something to get some energy, it doesn’t have to be a nuclear bomb in a bottle. silicon dioxide, ( SiO2 ) if I’m 100% correct its sand and Water ( H20 ) And Carbon dioxide ( CO2 ) This all above are all natural waste products So can this stuff be used in fission? Then further broken down? Like if you split water “Huge amount of energy needed” you get Hydrogen and Oxygen. Can you use Hydrogen to do fission with? Maybe that can cover the Electrolysis process? Will like some feedback on possibilities? Link to comment Share on other sites More sharing options...
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