Started by drunkenshoe, February 18, 2021, 02:27:20 PM
Quote from: Mike Cl on February 25, 2021, 06:22:30 PMThe book--The Moon Is A Harsh Mistress--introduced this concept to me for the first time:"A mass driver or electromagnetic catapult is a proposed method of non-rocket spacelaunch which would use a linear motor to accelerate and catapult payloads up to high speeds.
Quote from: Hydra009 on February 25, 2021, 06:46:54 PMYep, and that would likely work extremely well on the moon.1) no need for propellants (which comes in handy since the propellants would themselves have to be launched from Earth to the moon, creating waste upon waste)2) the moon can easily accommodate a longer track (it's free real estate) to provide a less bone-shattering acceleration.
Quote from: Hydra009 on February 25, 2021, 07:00:27 PMThe basic physics haven't changed since then, and ability to actually create one has markedly improved. So I don't see why we couldn't do it for real, with enough of a budget and the political green light.https://en.wikipedia.org/wiki/Mass_Driver_1
Quote from: SoldierofFortune on February 26, 2021, 01:59:32 PMAt the rate of the growth of the population, it is obvious that one day will come and there will not be enough space for people to dwell.
QuoteWe are reproducing like insects. It cannot go on so.
Quote from: Hydra009 on February 26, 2021, 02:44:50 PMSpace is no problem. Just ask Canada and Russia. Plenty of space. It's food, clean water, medicine, etc that's the problem.Global population growth has been steadily going down. It peaked in 1968.But as one might imagine, 1%/year growth is a lot larger in absolute terms when the population is 7 billion than it was when the population was 5 billion.So between 2050-2100, the total population is going to balloon out before finally contracting. The problem is that it's going to flatten out at 10+ billion, which is very high and we're either going to have to change how we do things or there just won't be enough resources to go around for a lot of people.
Quote from: Cassia on February 26, 2021, 03:19:27 PMEach Earth species is optimized for such a narrow range of conditions that a relatively slight environmental shift right here on the home planet has ended 99% of them. Millions of years of evolution to match earth's gravity, temperature ranges, atmospheric pressure, humidity, low radiation levels, respiratory gas mixture, light exposure, organic (plant/animal based) and exacting mineral nutrient sources, water sources, symbiotic relationships with micro-organisms (e.g. gut flora) and mechanical shock and vibration limitations.
Quote from: SoldierofFortune on February 26, 2021, 03:52:11 PMThe only species that can adapt to live everywhere on the Earth is human.