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Airbrush last won the day on July 13 2018

Airbrush had the most liked content!

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About Airbrush

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    Surfing, Artwork, Science
  • College Major/Degree
    CSULA BA Art (1979) & BS Accounting (1989)
  • Favorite Area of Science
    Astronomy & Cosmology
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    Bookkeeper - Retired

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  1. If it would be idyllic to float above the clouds of Venus in a giant airship, you better not fall out because you will land in hell. It takes just one crazy, homicidal, suicidal person to destroy a huge airship, and there is no parachuting to safety I do wish they would send a super tough lander to Venus, just to see how robust they can build a rover, comparable to the Curiosity Rover on Mars, but able to withstand such high temperature and pressure. Maybe it is still impossible.
  2. As an American, what I think about nuclear N Korea is their missile technology is a diversion. They have no incentive to launch a ballistic missile against any other nation. The missile launch would be detected and the source located. This would be definitive proof of a war crime. Retaliation would be immediate, overwhelming (fire and fury) nuclear, and totally destroy most of N Korea's military infrastructure, and everything dear to Kim. Their nuclear weapons are worth a lot of money to a terrorist group that has that much cash. What would a nuke be worth on the terrorism market? Kim is desperate for money. N Korea could secretly sell a nuke to a terrorist group for a high enough price. The terrorists transport the nuke in an old fishing boat. They park the boat outside a major port city. They drop the nuke to the bottom in a good depth of water. Nobody could prove the nuke came from N Korea.
  3. As you note, it would also be worthwhile to build a comfortable spaceship with centrifuge for human compartments, for the luxury of one g gravity for a long-term mission of several decades, if not a one-way trip. You find the best prospect asteroid with lots of, easy to extract, water-ice. The spaceship parks nearby the asteroid and workers commute to the ice digs, in work in shifts, where ice blocks are hauled to a processor that extracts water, and creates air and hydrogen fuel to power the whole operation. With climate change here on Earth, rising sea levels, coastal dwellers forced inland, and growing populations, scarcity of water, political strife, etc, etc, life on Earth could become quite miserable for the majority in the near future, and many people would be glad to take a one-way trip to Mars or an asteroid, IF they can have a good time going there and working there. It will have to be fun, or at least MORE fun than their life on Earth. On their one-way trip they should have great video games to play and something like the Star Trek "Holodeck" for recreation.
  4. Then one milli-g is one thousandth-g for an asteroid 10 miles in diameter. How much gravity for an asteroid 100 miles in diameter? I'm searching for the ideal size and gravity of an asteroid to attach an ice-processing factory. Suppose an asteroid 100 miles in diameter has a gravity of about 20 centi-g or one-two-hundredth-g. You divide the mass of your ice slab by 200 for Earth-weight conversion. So if I could carry in a backpack 50 pounds on Earth I could carry a slab of ice that would weigh 1000 pounds or half a ton on Earth. Do we even have the technology already to launch a module into orbit that can land in an ice field in Antarctica and start cutting into the ice with lasers and convert ice into air, water, and fuel automatically?
  5. This is how I think humans can best adapt to outer space. What you need for survival is just water-ice. If you can find a large supply of ice on an asteroid of maybe 100 miles in diameter, you can start building your space station there. You can also get a centrifuge rotating at one g gravity for crew quarters. How many g's of gravity would the workers experience working on a 100 mile diameter asteroid? If a 10 mile diameter asteroid has about ONE NANO G. Then a 100 mile diameter asteroid would have about 10 to 20 NANO G's? Anyhow it is so low a gravity that very massive volumes of ice could be moved and processed with minimal amounts of energy. You excavate the ice using laser cutters then the ice is transported to a nearby processing station that melts the water out of the rock and from the water you get oxygen for air, and hydrogen for fuel. You can start using the hydrogen fuel to power the cutting lasers and excavation. And the workers have air and water. You can fabricate ice panels for building. As you dig into the asteroid you can start building your space station INSIDE the asteroid where you dug out the ice, and you will be sheltered from cosmic rays and micro-meteors. We can use asteroids as gas stations and as stepping stones to other stars. Who cares about the Moon and Mars?
  6. Who cares about intelligent life in another galaxy? I'm only interested in something nearby, like what is within our reach? How many habitable planets are within a radius of about 100 LY or even 1000 LY?
  7. Any means of anchoring the laser, or no anchoring at all. Just using rockets to counter the cutting lasers thrust. Only needs a tiny thrust right? Because of the very low g work environment, workers could literally carry thousands of tons of material on their backs across the asteroid, to the materials dump and sorter, right?
  8. One nano-g sounds close enough to zero g for most purposes. So the 3 kW laser will need to be strapped securely to the asteroid. Even heavy volumes of material will be very light-weight and easy to transport to processing stations.
  9. How about attaching high-powered cutting lasers to cut neat slices of rock, ice, and metals, to be processed. If the asteroid is, for example, 10 miles in diameter, how many g's will that result in? Living quarters can be a comfortable one g within a short commute.
  10. Could you elaborate on what 2 carbon nano-tubes are? One nano-tube for each laser? Why do you need to heat cables? Let the lasers do the cutting.
  11. Dynamite will cause the material to be lost into space, or push the asteroid around uncontrollably. You need drills and claws to gather up every precious bit of water-ice (which makes air, water, and fuel) and metals to fabricate structures. The other benefit of being on an asteroid is you can have centrifuges for creating one g for sleep and recreation. The workers go outside and work in zero g.
  12. On the subject of Climate Change I was wondering how some others notice different weather in their hometowns? I have been living in Southern California, in the hot San Fernando Valley, for 25 years. This summer is strange, there has been only one real hot day of plus 100F degree heat. We are past the middle of June and the weather every day is cool, in the low 80s on the hottest day, usually overcast in the mornings, even into the afternoons, in the 60s or 70s, cool compared to the hot, hot summers that are usual for this area. Very nice weather.
  13. So that means a light saber is a retractable mirror suspended at the end of a metal rod? For a double-edged sword you may have 2 lasers between the mirror and the hilt. Ok that makes sense. I would prefer Sgt. Saunders Tommy Gun.
  14. Yes why bother with planets when you can find asteroids with water-ice and the metals necessary for industry? Just burrow into such asteroids. How can you excavate large volumes of rock, metal, and ice?
  15. Could that dark spot be looking down a vortex, such as a tornado funnel vortex?