Showing posts with label off-earth. Show all posts
Showing posts with label off-earth. Show all posts

Sunday, November 28, 2010

Getting away from it all

When the world is too much with us, late and soon, we can contemplate leaving it. And I don't mean suicide, I mean leaving it physically -- you know, space, the Final Frontier, etc.?

I've brought this up before -- e.g., here and here -- but the context was pretty much limited to just getting off the planet, or going as far as colonizing Mars. Turns out, though, that there is no real "final frontier" -- each step we take only opens up a further and greater step, challenging and daunting both. We've already gotten off the planet, after all, and as far as the Moon in exploratory modes, but Mars is now an enormous leap for which we haven't yet mustered either the nerve or rationale. And beyond Mars lie still greater gulfs.

Ultimately, though, the Solar System itself is just a backyard, and it's interesting to find that a few people are already getting serious about looking further out -- so here, for example, is a "Status Report on the Tau Zero Foundation":
Ideally, we want to cover all the technologies and implications related to the ultimate goal of reaching other habitable worlds, and we want to do that in a manner where you can count on the accuracy of our information (which is why we include reference citations so that you can check any questionable assertions). This span includes understanding ‘what’s out there,’ examining all the options for ‘how to get there,’ and being sure to tie this all to its ‘relevance to humanity.’
One of the most hotly debated items is how best to get out there. To be explicit, Tau Zero covers the full span of options, from the seemingly simple solar sails to the seemingly impossible faster-than-light travel. For each option within that span, there are different levels of readiness and performance, and accordingly different types of work.
Within that span of options, here's one that seems at least plausible with known technology, and able to reach speeds of between 10% and 92% light:
Failing the discovery of something akin to 'sub-space' we will be forced to obey, in our exploration, the seemingly unbreakable laws of relativity – which gives us a universe limited by the speed of light. It is now, and probably forever shall be the case, that the universe, and we, must play within the bounds of the chessboard discovered by Albert Einstein.
Most of the equipment for the rocket itself can be assembled using today's technology. Providing the fuel, however, becomes problematic. We would require an array of solar powered linear accelerators ('atom smashers') girdling the moon's equator. Mega-engineering projects require, in their own turn, miniature self-replicating factories that draw building materials directly from the lunar soil. Current advances in robot technology teach us that we should be able to climb this technological hurdle by about 2040....
What makes it possible for the realities of scientific achievement (Valkyrie rockets) to catch up with the fiction (starships) is that Valkyrie is the ultralight of rockets, consisting mostly of naked magnetic coils and pods held together by tethers. Indeed, it can best be summed up as a kite (with magnetic field lines instead of paper sheets) that flies through space on a muon wind of its own creation.
All of which, of course, is certainly a far remove from, oh, say, the recent mid-term elections, or the latest spins and tantrums of the politically obsessed. But that's the point.

Monday, October 4, 2010

Among the eco-fans

Where it's important to remember that "fan" is short for "fanatic".

First up, of course, has to be that demented ad for something called the "10:10 climate change campaign" in Britain. Apparently, it was thought that showing warmist believers in positions of authority blowing minority skeptics, including school children, to bloody bits would be funny. Which, in terms of the comedy of stupidity, it kind of is, but not in the way intended. Anyway, here's a link to the original (hastily taken down by the 10:10 campaign itself, but not hastily enough to prevent it going viral). And here's a re-mix, which nicely exposes the murderous rectitude at its base:


Thanks to Hot Air




The next stop doesn't have quite the impact of the previous, and at least doesn't pretend that it's "funny" -- it's a post by Doctor Science at Obsidian Wings, entitled "Of Stink Bugs and Men". It's point is simply that human beings, in coming out of Africa, are an "invasive" species, like, oh, stink bugs, kudzu, or cane toads. Never mind that the nasty examples mentioned are nasty only in a human-centered orientation in the first first place, nor that every single land animal is also an "invasive" species, nor that the "invasion" of new ecological spaces is a natural aspect of evolution for every species that ever existed -- no, what's intended by this particular observation is just a variation on the common theme in the large pathological wing of eco-ideology, that human beings are a "cancer on the planet". As the Doctor says:
The overwhelming factor, for H. sapiens as well as stink bugs, is that our native range is adapted to us -- humans or bugs become dangerously invasive when we can escape not just the limited space of our native range, but the constraints on our population that come from other co-native species: predators or parasites (including diseases).
Thanks to Megan McArdle 

If we strip the pathology from this, though, it becomes more interesting -- human beings became successful, in an evolutionary sense, when we escaped the constraints of our initial environment and began to colonize wider spaces, following retreating glaciers into environments that must have seemed impossibly harsh in comparison to our origins. The courage and drive of those early "invaders" can provide us with a good lesson now -- having spread to all corners of the globe, isn't it time that we start to look beyond it? Those who look upon humanity as a kind of stink bug or cancer, of course, would say no.

I'd say yes.

Sunday, August 15, 2010

Those not busy being born ...

... are busy dying, as B. Zimmerman said.

I wanted to expand on a quick remark in a previous post, where I said "... without growth, this is not a civilization that will simply stagnate (much less settle into some bucolic steady-state) -- it will tear itself apart in a zero-sum war of all against all." Why is that?

Primarily because people have aspirations, material aspirations -- for themselves, obviously, but perhaps even more strongly for their children. As long as the economic game in which they're engaged is positive sum -- i.e. as long as the economy, over the long haul, grows, the pie expands -- there is at least the potential for those aspirations to be realized for everyone, and this is widely understood. But once long-term growth comes to a halt, the only way any one player can realize his/her aspirations is to deprive another of theirs -- the zero-sum Hobbesian hell mentioned above.

It's true that historically some civilizations have existed in a more or less steady-state for relatively long periods (e.g., Egypt, China), but of course this culture is not like those. What makes this culture distinct is precisely the inverse of what allowed those and other pre-modern cultures to persist so long with so little structural change: the absence of a systemic, politically enforced hierarchy. Steady-state cultures, in other words, must rely on some notion of "place" and must make an ideology out of keeping to one's "place" in this world, putting off hope of satisfying one's aspirations to the next (see also The Theme). Little wonder that modern thoughts of a steady-state society are always so associated with the political left and its project of a state-enforced egalitarianism, since, in the absence of that obsolete ideology of "place", they have to hope that they can at least minimize evidence that anyone could ever do better.

Unfortunately -- not just for them but for all of us, if we can't find a way to sustain growth -- even such a leftist totalitarianism will not obliterate human aspiration.

Wednesday, August 11, 2010

Time to boldly go ...

... to, you know, where no one has gone before. Space, dummy. The Final Frontier.

So says Stephen Hawking, at least: "'We have made remarkable progress in the last 100 years but if we want to continue beyond the next 100 years our future is in space.'" I concur, as Bart would say. Quite apart from the sort of cosmic safety concerns that Hawking raises, there is the simple fact that we cannot grow indefinitely if we remain bound to Earth. And without growth, this is not a civilization that will simply stagnate (much less settle into some bucolic steady-state) -- it will tear itself apart in a zero-sum war of all against all.

So with that in mind, some links pertaining:
"Imagine a space program based on a vision of settlement, rather than exploration. A vision of billions of people living in hundreds of thousands of orbital colonies serenely orbiting Earth, the planets and our Sun. The current vision is about putting small numbers of people very far away entirely at government expense. Space settlement is about putting very large numbers of people in space primarily at their own expense, and making sure it’s nice enough that they stay and raise the kids. While the current exploration vision is expected to cost about $100 billion up to the first visit to the Moon, the settlement vision is many orders of magnitude more expensive, making government funding impossible. But government can play crucial role. Specifically, perhaps we could use something close to the current NASA budget to stimulate much larger private investments. In this vision, government funds are devoted to prizes, test facilities and technology development, along with NASA’s traditional science and aeronautic activities. Operations are left to the private sector."
  • Reaction Engines Ltd., a UK firm, with their sleek Skylon Single Stage to Orbit spaceplane as the working basis for a mission to Mars. Here's their "Troy Mars Mission" page, and here's an animated presentation.
  • Before this, of course, there was Zubrin's "Mars Direct" (modified to "Mars Semi-Direct"). But much more to the point is the Buzz Aldrin endorsed "Mars to Stay" proposal -- in his words:
"In recent years my philosophy on colonizing Mars has evolved. I now believe that human visitors to the Red Planet should commit to staying there permanently. One-way tickets to Mars will make the missions technically easier and less expensive and get us there sooner. More importantly, they will ensure that our Martian outpost steadily grows as more homesteaders arrive.

Instead of explorers, one-way Mars travelers will be 21st-century pilgrims, pioneering a new way of life. It will take a special kind of person. Instead of the traditional pilot/ scientist/engineer, Martian homesteaders will be selected more for their personalities—flexible, inventive and determined in the face of unpredictability. In short, survivors.

But for this dream to happen, NASA needs to dramatically change its ways. Its myopic Vision for Space Exploration will never get us to Mars. Progressive innovation and enlightened international cooperation will. President Obama and Congress need to set NASA right—and soon.

There, I've said it. No regrets this time."

Wednesday, July 21, 2010

Mars IS the answer!

Now, okay, maybe the sing-song sounds a little funny at first, and the refrain gets a bit repetitive toward the end, but I still think this is inspiring:



(Notice the blue sunset at the 22 second mark? We're not in Kansas.)

A quick point: eco-people have been predicting dire events -- global catastrophe, apocalypse, etc. -- since at least Malthus (an early Greenie?), and have been proven wrong time after time after time. Hasn't stopped them from continuing to generate their "scary scenarios", and of course there's always a market for that sort of "End is Nigh!" sandwich-board advertising anyway. But it has at least helped many people see their proselytizing for what it is.

They do, though, have one ultimate point that rests on logic, not events: you cannot grow indefinitely given a finite resource. Mars -- and space generally -- is the logical answer to that logical point.

(The emphasis in the post's title, by the way, is just a result of a bumper sticker I remember seeing a while back, that had some allusion to the "limits to growth" and the line "Mars is not the answer". )

Tip to Speculist

Friday, June 11, 2010

Halfway to anywhere

A space elevator in 7 years?