Jump to content
Science Forums

Eclipse Now

Members
  • Content Count

    887
  • Joined

  • Last visited

  • Days Won

    22

Everything posted by Eclipse Now

  1. And rather than just quoting something - what are your thoughts on the subject? I'm convinced we have the technology to offer everyone on earth a convenient modern life. We just need the political will power to do that. Ecocity or New Urban planning is one of those technologies. Please watch this video, it's only 4 minutes and it rocks.
  2. Yeah, plastics, pollution, overuse - half the world's rivers don't even reach the ocean. But new types of agriculture are coming that use water totally differently. On the positive side, there are efforts in some of our cities to unearth old rivers. The Cheonggyecheon in Seoul is a great example. This river was once a mere drain, covered in traffic clogged highways and forgotten. Now it is a peaceful recreational park and cycleway. It attracts crowds that support local businesses. It cut through the choked highway and - with a few bus services and cycleways - the highway traffic didn't ju
  3. I would put it slightly differently and say that our current technologies are incompatible. That is changing. You mentioned hemp above? That is just one example of alternative feedstocks that can fundamentally change the industrial ecosystem. I'm convinced we already have the Technology to feed, clothe, house, warm, cool, transport, and educate all 11 billion of us that are modelled to be here this century. Renewable energy and Breeder Reactors that eat nuclear waste could power our lives. New Urbanist and Ecocity plans can give us comfortable walking-distance lifestyles on a fracti
  4. I see climate change as both a dangerous problem to national prosperity in itself, but also an extraordinarily dangerous threat multiplier - and that the geopolitics of climate change could vastly outweigh problems with sea level rise etc. One big nuclear war could solve climate change - and bounce us back into the ice-age direction. But that might just ruin our whole day! On the other hand, I'm also very sceptical about various renewable energy papers. The answer? Abundant reliable power from nuclear energy - but in many nations - and especially my homeland of Australia where it remains
  5. Help! My opinion seems to be changing and I don't like it! I'm a fan of nuclear power for Australia, but I'm starting to have second thoughts. Not because of any over-hyped problems with nuclear - but because of how cheap Wind and Solar Plants (WASPS) are becoming. 100% renewable papers used to assume all this extra electricity storage from pumped hydro acting as big 'batteries'. But on-river pumped hydro is already over-used, doesn't have enough estimated resource to backup today's grids, and has serious ecological concerns with these dams destroying our last fisheries and intact ecosyst
  6. This is my most recent draft. I hope it summarises my core argument first and has clearer writing about the other peripheral subjects later. Warning: it's fairly long, but the first 2 points are so worth it! Stop at Blue Mars if you wish as that's half way, and everything after there becomes a bit more speculative. MARS V the BELTERS While I eventually would love to see *all* of the solar system settled and O'Neil colonies everywhere, I think we should start with Mars first. There are 3 main reasons: the City Size Bonus, Technology Bottlenecks, and the Myth of Self-Replication Mining ship
  7. he box to come up with this as it's a whacky option that's so crazy it just might work. I wouldn't have thought of it in a million years. TIDALLY LOCKED VENUS Throw tens of thousands of large asteroids or Kuiper belt objects at Venus to speed up its rotation till its day equals its sun, locking one side permanently towards the sun. The sunny side would be perfect for solar energy the CO2 would drop and fall on the dark side We would colonise the middle twilight ground Creates amazing energy potential on the sunny side Deals with CO2 once and for all Tens of thousands of asteroid impa
  8. I said Zubrin smashed it. This was the reply to my post on another forum. I think I'm changing my mind! No, he doesn't. He's a smart guy, but he's also dogmatic. He can't get past his Mars (Semi) Direct plan. His criticisms of ITS read like a blow for blow list of differences from Mars Direct. Mars Direct has its merits if you want an Apollo style mission. It makes no sense for this context. SpaceX wants to build an interplanetary railroad. That requires bringing launch costs down, which requires reusablity. (Fuel costs far less than building safe, dependable, human rated, rocket ships.) If
  9. Thanks Craig, great summary and I finally get it. I guess the first few flights should absolutely have an ITS that lands a fully fitted out habitat. But once there are say 500 to 1000 people on Mars, we can revisit the ITS plan to try and get the ticket price down by having the Mars base build their own habitats. The reason is cost. It's the old problem of the cost of a plane flight if the passengers are buying the plane outright for one flight. So the first 5 to 10 trips should definitely land habitats fully fitted and ready to live in and extend! But at some point the goal would be to bring
  10. Hi all, can anyone explain to me in English how Zubrin thinks he has a plan to get 10 times more use out of Elon's ships? I could not understand how the 1 ship gets 10 times more use.
  11. OK, so vat-grown meat is a thing. http://www.nextbigfuture.com/2017/02/lab-grown-meat-prices-have-dropped.html But what if the feedstock is unsustainable? Could we use processed kelp as a feedstock for all our meat and chicken and turkey needs, so that we would never have to kill real live animals for protein again? Anyone know any biochemists that might work in this field?
  12. Hi all, I found the answer. Let me summarise! Seaweed farms could revolutionise the world. 2% of the world's oceans are nutrient rich enough for these farms. Nutrients come from coastal erosion or oceanic upwelling. Sometimes there is nutrient pollution which causes algal blooms and dead zones. Seaweed farming can help mop up excess nutrients and restore ocean health. A new vertical column method of farming the oceans grows both kelp and shellfish and oysters and even encourages fisheries to grow in an ocean ecosystem based approach. Watch this 15 minute TED talk about seaweed feeding the
  13. The seaweed ecology wiki only mentions sunlight and a shallow enough anchorage point to grow seaweed. Nutrients may not be the limiting factor I thought. https://en.wikipedia.org/wiki/Seaweed#Ecology Tim Flannery again:- If big oil get wind of this, then let them at it! 1. 200kg of seafood per person! That’s over half a kilo per day! 2. Some of our NPK nutrients – normally flushed out to sea via the toilet – recaptured for land farming. 3. And biogas energy backup for a renewable world that the politicians and pundits seem so intent on! 4. Maybe some biochar left over to help retain that NPK
  14. Hi all, I've edited this thread to simplify the issues, and investigate the following questions:- * SYNGAS FROM SEAWEED TO BACKUP ALL RENEWABLES WORLDWIDE! A ton of CO2 concentrated into biomass is about a ton of wood. 40 Gigatons would 40 cubic kilometres of woody waste to dispose of each year. We already know how to biochar any dried biomass waste. 40 cubic kilometres into a biochar unit could produce maybe 20 cubic km of biochar and 20 cubic km of synthetic gas to replace petroleum and natural gas? Wow that's a lot. That's vastly more than the 'cubic mile of oil' we use a year (or 1.6 cub
  15. Tim Flannery talks about using 9% of the world's oceans to farm kelp to sequester 40 Gigatons of carbon emissions annually, or roughly 2ppm CO2 per year. goo.gl/n6iFdG Seaweed farming is already an established industry in many countries, but this project would be expanding it by 20,000 times. https://en.wikipedia.org/wiki/Seaweed_farming
  16. By the way Moontanman, this guy is now my favourite youtuber and I have watched dozens of his movies, and will continue to do so! Thanks for that reference, a real gem. And the fact that I watch so much youtube kind of reinforces the conversation above: TV viewing declines in 'real time'. As long as the Mars & other colony databanks keep sucking down the juice from Earth, and people can get their next season of Daredevil and Jessica Jones from Netflix, they'll be happy. The only real drag is online gaming and Skype are out, but many people will adapt to Facebook chats etc in bit-by-bit sta
  17. Hi Craig, great breakdown. So the ticket price includes all the equipment to establish a colony: that's awesome. Now I'm wondering what it might take to get them spreading out away from the new colony at Mars. A demand for methane? Would a space elevator at Titan be a desired outcome of a colony there, flinging large tankers of methane back to Mars? But as I understand it, one of the main rationale for Mars is that it has everything we need in one go. Land there, and you could eventually start mining and building a whole new planet based civilisation. There are, of course, asteroid buffs tha
  18. So if that's for real, it seems that there would be a bunch of reasons to thicken the atmosphere as soon as we determine there's no native life to worry about. 1. Radiation protection! We wouldn't need magnetosphere to protect us as one fifth atmospheric pressure is enough to bring the surface radiation down to safe levels. 2. Clothes! Dump clunky vacuum pressure-suits and just wear normal warm clothes! (With an oxygen mask of course, just like on a high mountain). 3. Farming! Some agriculture could begin on the Martian surface, without pressure domes. 4. Easier construction! Habita
  19. Hi all, I asked some people on another forum whether a post-terraformed Mars would require a magnetic field to protect Elon Musk's bold new Martians ( ) from radiation, both solar and cosmic. These are some of their replies, and not being technical myself, I wonder if you could check their working? If the claims below are true, then we "only" need to cook the CO2 poles and then Mars will have enough atmosphere to avoid a space suit (but wearing very warm clothes with breather mask), start growing some crops on the surface without habitat domes, AND be protected from radiation. So, 2 qu
  20. Interesting perspective! And interesting time indeed! Yes, people living on Mars sometime in the 2020's! I'm in my late 40's, and this is the stuff I've been waiting for my whole life!
  21. I can't see anything about how Space X will finance the setting up of the colony. Does $200k per ticket include the 'luggage' like.... habitats? Greenhouses to grow food? A couple years of freeze dried noodles and protein bars, etc? Is it $200k per person of a certain average weight, and then $200k for any luggage of the same weight?
  22. Elon wants a fleet of shuttles flying back and forth between Earth and Mars, eventually building up to a fleet of 1000 ships. When they depart it will be "Kind of like Battlestar Galactica!" http://www.wired.co.uk/article/elon-musk-speech-mars-plan With this many ships eventually going to Mars Space X will have brought the cost down to a few hundred grand per passenger AND created a refuelling depot on Mars. Surely it would only take a couple ships to then leave Mars in the other direction, to mine the asteroid belt, and we'd have a truly space-faring civilisation able to colonise alm
  23. Hi all, anyone here been following this group? They're real, peer-reviewed climate scientists that are freaked out about a new 'methane bomb' hiding off the Arctic. It's very scary stuff that seems misunderstood by other more mainstream climatologists. Have a look at their major summary papers down the side of the blog and let me know what you think. http://arctic-news.blogspot.com.au/
  24. Hi, Good question billvon, and I'm sorry I phrased it that way. I made it sound like they were out on the marketplace already! ( went back and edited the post to make it clearer.) This is Thorcons estimation of how cheap they could put power out, based on the fact that they have plans for a factory that will put these Molten Salt Burner reactors up on the assembly line. They'll require a fraction of the steel and concrete and fuel of a standard coal plant. These plans are ready to go. They're just burners, as the future thorium breeders still need a bit of work. But those breeders are coming
×
×
  • Create New...