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Terraforming - Human Destiny or Hubris?
jangobongo writes "Space.com has a thought-provoking article written by Dave Brody for Ad Astra Magazine about the practical and ethical aspects of terraforming other planets. Mars is currently the focus of most terraforming debates, but the author's conclusion is: 'What works is what takes the least work: [terraform] asteroid/comet resources in near Earth orbits... Humanity would get lots and lots of cheap, free-floating, scalable, designer settlements in interesting, useful orbits.' These would then become stepping stones to other planets in our solar system and beyond."
You could build some sort of settlement, but it would always have to be enclosed. The resources and conditions are just not right for atmospheres.
I think there comes a time when a society or civilization must stand up and ask "What is important to us?"
As there's no current signs of anything we consider 'meaningful' life, it appears that the nearest planet shall be our manifest destiny. If, however, there was ANY reasonably meaningful life detected (or evidence of past life), I think this would be a much more significant debate.
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Ad Astra was originally a space settlement magazine when the L5 Society merged with the National Space Society on condition that the emphasis on space settlement remain its ultimate priority.
What is the difference between a space settlement and a terraformed planet, you might ask?
The fact that you need to ask is evidence that the foundation of the National Space Society was long ago abrogated for more "fashionable" pursuits, such as those promoted by hucksters like Zubrin.
One of the better answers to that question is in Mike Combs' Space Settlement FAQ
Since the Ad Astrans have had the unmitigated chutzpah to quote the originator of the space settlement idea without talking about actual space settlement -- pretending the idea simply doesn't exist, I'm going to provide an appropriate rebuttal: The entirety of Mr. Combs' FAQ.
What is space settlement?
Space settlement is the concept of colonizing space by using extraterrestrial resources to construct artificial, closed-ecology habitats in orbit.
What is a space habitat?
A space habitat would be a pressurized sphere, cylinder, or torus (donut shape), rotating on its axis so that centrifugal force serves as an artificial gravity. The interior is landscaped with soil, water, and vegetation. Sunlight would be gathered by mirrors and reflected into the interior of the habitat through windows. The goal is to create as Earth-like an environment as possible.
How is space settlement different from any of the other space colonization proposals?
Most thinking regarding human expansion into space has focused on the settling of the surfaces of other planets, sometimes after modifying their environments to make them more Earth-like (called terraforming). The space settlement concept maintains that planets are not the most ideal location for human colonies beyond the Earth.
Aren't we going to terraform Mars or Venus?
Terraforming is a long-term project requiring technology significantly advanced over what we have today. Even terraforming advocates admit it would take a minimum of 200 years to modify Mars to the stage where even simple anaerobic microorganisms and algae can survive. [Ref: Terraforming: Engineering Planetary Environments, Martyn J. Fogg, SAE Press 1995.] Space habitats, on the other hand, can be built with today's technology, and would be homes in space which people initiating the program could move into within their lifetimes.
Interstellar travel may someday become possible, but we have no guarantee that Earth-like planets will be as plentiful in the Milky Way galaxy as they have been in Hollywood, CA.
What advantages would orbital settlements have over a colony built on another planet?
Sunlight also drives the life-support system of the habitat, so the day/night cycle can be set to whatever is convenient. Compare this to the moon, where there is 14 days of continuous daylight, and then a 14-day-long night. Here, some alternate energy source would probably have to be used half the time.
Seastead this.
Let's work on immortality.
I'd hate to move to an asteroid outside of earth's orbit and die from this stupid cellular aging when I could've been floating above Uranus staring at that big red spot.
Wait a minute...
We have secretly replaced these Slashdot mods' sense of humor with a rusty nail. Let's see if they notice!!
... that the whole mars terraforming thing was mostly a way for scientists to get people to pay for missions to mars, to answer basic questions about the universe, because it's easier for people to grasp.
Much the same way "doing research in space to cure cancer" was a great way to pay for a space station, at least until it became something to keep the Russians busy with so they wouldn't make ICBMs for North Korea or something.
Gentoo Sucks
What we need to have is giant solar panels in orbit around Venus to beam back all that solar energy as useable energy. With the supply of most fossil fuels disappearing over the next 50 years, we need a new alternative energy source. Assuming, of course, that the ozone doesn't disappear first and we all die from radiation exposure. Maybe we need to build underground cities first. Hmmm...
This is where we are going, right now all our eggs are in one basket, and this basket has proved itself to have major shake ups in the past, I dont think there could be a geological event that could kill ALL humans, but it would definately set us back thousands of years.
Terraforming is the one skill that will define Humanitys' ability to spread, and consequently SURVIVE, And its not about terraforming asteroids, sure its a step, but not a viable habitat should all technology fail, thats what terraforming is all about. Its a "save point", set up another system, such as a planet, where should all modern technology fail, humans could have the time and resources to rebuild to an albeit different but self sustaining civilization. And keep the process going for how ever long we have viable resources.
On the ethics of terraforming, I guess im a bit too darwinian to bring any ethics into this, for me and many others its simply a SURVIVAL issue, if there were life on a planet that we wanted to make in our image, should we kill them to support us? I am confident we can handle that question when It arises, and not piss ourselves thinking about it now, we are already developing the technology, and its only a matter of time.
You can liken terraforming with the modern industrialazation. Yes, a lot of people and places died to make it happen, and there were lots of areas we pretty much destroyed in the name of progress, but we are better off from it, we still have national parks, and most of our natural beauty on earth. But we have moved forward. There is no doubt my kids generation or later will have to deal with "Planet huggers" and what not, but generations later they will have the ability to complain, because of the work we will do for our survival.
There is truth in humor.
I've always been a fan of boring out a station in the asteroid Eros, and spinning it up like the picture shows to create 1g artificial gravity at the ends of the asteroid.
Seems like the only way to get a large colony in space is to use materials already there.
Eros is attractive because we have already landed a craft on it.
This debate me of something I saw over on SciScoop some time ago:
(pasted below)
I recently heard Rick Tumlinson of the Space Frontier Foundation speak on a couple of related issues, and he gave us a very interesting perspective on all this - to paraphrase as best as I can remember:
"There are three distinct philosophies on doing things in space, which we can identify with three individuals: Carl Sagan, Wernher von Braun, and Gerard O'Neill. To the Sagans of the world, space is wondrous, grand, amazing, spectacular, and we should be learning all we can about it - but 'don't touch'! To the von Brauns, space is a proving ground for national grandeur, a place where we show how our engineers are the best, where we build the biggest rockets, the best space stations, and parade our astronaut heros to the world. To the O'Neills, however, space is the new American West: a place of hope and economic opportunity for all people."
Both the Sagans and the von Brauns have strong and traditional representations at NASA - the scientific and robotic missions follow that Sagan philosophy of "explore, but don't touch". Apollo was of course the quintessential von Braunian project, and the manned programs at NASA have attempted to follow in that mode ever since. But the O'Neill vision of space as a place for all people, as a location with resources bringing economic opportunity for the world, has had very little say in NASA up to this point.
Back to the current discussion, on the topic of terraforming Saganites seem to be against it quite often, as they're afraid of humans disturbing the sanctity of space. There's also bioconservatives who tend to see humanity as a virus which they want to keep quarantined to Earth, if not eradicated completely.
Many von Braunians are in favor of terraforming, while O'Neillians are very much in favor of both terraforming and orbital settlements. I personally think of myself as a Saganite that's recently "converted" to being an O'Neillian. There are few things I want to see more than see humanity become a multi-planet, spacefaring species.
I recently found out about paraterraforming, which seems like an ideal way to do things. Basically, instead of terraforming an entire planet at once over a period of centuries, you construct a habitat which expands over time. From Wikipedia:
r aforming
http://en.wikipedia.org/wiki/Terraforming#Parater
Also known as the "worldhouse" concept, paraterraforming involves the construction of a habitable enclosure on a planet which eventually grows to encompass most of the planet's usable area. The enclosure would consist of a transparent roof held one or more kilometers above the surface, pressurized with a breathable atmosphere, and anchored with tension towers and cables at regular intervals. A worldhouse can be constructed with technology known since the 1960s.
Paraterraforming has several advantages over the traditional approach to terraforming. For example, it provides an immediate payback to investors; the worldhouse starts out small in area (a domed city for example), but those areas provide habitable space from the start. The paraterraforming approach also allows for a modular approach that can be tailored to the needs of the planet's population, growing only as fast and only in those areas where it is required. Finally, paraterraforming greatly reduces the amount of atmosphere that one would need to add to planets like Mars in order to provide Earthlike atmospheric pressures. By using a solid envelope in this manner, even bodies which would otherwise be unable to retain an atmosphere at all (such as asteroids) could be given a habitable environment. The environment under an artificial worldhouse roof would also likely be more amenable to artificial manipulation.
It has the disadvantage of requiring a great deal of construction and maintenance activity, the cost of which could be ameliorated to some degree through the use of automated manufacturing and repair mechanisms. A worldhouse could also be more susceptible to catastrophic failure in the event of a major breach, though this risk can likely be reduced by compartmentalization and other active safety precautions. Meteor strikes are a particular concern in the absence of any external atmosphere in which they would burn up before reaching the surface.
Small Worldhouses are often referred to as "Domes".
So, no, IMNSHO, I think we're much more likely to end up ripping the planets apart (oh the humanity! how unromantic!) to make better use of the matter, than wasting space & energy by living on the limited surface area of a gravity well.
Power to the Peaceful
Trust me -- terraforming any of the planets in our solar system is going to be cheaper than that.
the growth in cynicism and rebellion has not been without cause
Why terraform?
Even the most advanced terraforming techniques would not produce an environment as pleasant (for the most part) as Earth's. e.g. You'll have issues of different planet mass resulting in different gravities.
Over the next few decades our understanding and mastery of genetic engeneering will make it possible to modify plants animals and humans to make them better suit the native environment.
e.g. a higher gravity planet could be accompanied by stockier and stronger genetic stock. e.g. different atmospheric compositions could be accompanied by modified respitory systems.
With a xenomorphing approach you could save on shipping out all the heavy terraforming equipment. Instead you can ship out a few kilograms of genetic material and assembly equipment. And grow the passengers on the other end. The lighter mass and simpler nature of the payload would mean it would be require less fuel to power the flight and higher accelerations would be possible meaning that more trips can be made for less cost in less time. That would beat having to ship out humans for multi-generational voyages.
Our moon is easier to get to, and has a lower gravity. So it's easier to "fly" on the moon. Also, since the moon has no atmosphere, there wouldn't be any wind loads on the structure. It would need a blanket of dirt to protect against very small meteorites, but then again, the dirt wouldn't impose much of a load.
Seriously. Ton of nukes at the martian poles. Heats up the planet, vaporizes the CO2 and water in the poles, thickening the atmosphere, and maybe putting enough of both out there to sustain plantlife and start making some o2.
"Sic Semper Tyrannosaurus Rex."