Showing posts with label curiosity. Show all posts
Showing posts with label curiosity. Show all posts

Monday, August 06, 2012

Bolt vs Curiosity: it's no match

More than a few news sites this morning selected Usain Bolt, the fastest man in the world, as their lead story. Bolt broke an Olympic record and ran the second fastest 100m ever recorded to win gold in London, recording a top speed of something like 45km/h.

Meanwhile, humans landed a small truck on Mars.

Every little boy (and plenty of little girls, I'm sure) dreams of running fast. And Bolt's 9.63s sprint was probably about two, three or four times as fast as most young children can run. I remember the first time I ran 100m against the clock, I came in at roughly 20s. I won't say how old I was...

Meanwhile, humans landed a small truck, weighing almost a ton, on Mars.

Bolt raced in front of a crowd of 80,000 at the stadium and hundreds of millions around the world. He is an international celebrity whose endorsement is worth millions to any brand and whose face is recognised by countless fans everywhere.

Meanwhile, humans landed a small truck, capable of finding evidence of extra-terrestrial life, on the ruddy surface of another planet.

Bolt's top speed was about 45km/h, the fastest any human has ever run. Curiosity's top speed was about 21,200 km/h. Bolt's speed was roughly double that of my boyhood efforts. Compared to my boyhood efforts at launching myself into space, Curiosity surpassed my - let's be generous and say 50cm - jump by a factor of 1.12 billion, travelling roughly 560 million kilometres from the surface of Earth to that of Mars. Bolt has trained for years in order to get every last detail correct: working on his running style, his start, his finish, his crowd-pleasing theatrics. Humans have been trying to work out whether there is or has been life on Mars for centuries and this mission has been in planning for eight years and en route for eight months, with scores of highly trained rocket scientists planning every last detail of a mission out of the Earth's gravity well, through the irradiated void of space and which culminated in seven minutes of terror, a hugely complex multi-stage precision landing procedure that had to be entirely automated, given the fact that signals from Mars to Earth take fourteen minutes and the entry only took seven. Imagine getting an almost one tonne truck to slow from over 21,000 km/h to zero in seven minutes while falling through a thin atmosphere with relatively strong gravity and landing on a precise spot on the far side of a planet without kicking up any dust or breaking billions of dollars worth of delicate scientific equipment. Wow.

So well done Mr Bolt. But what kind of planet do we live on where many of the major news organisations think that a man doing what humans have done for hundreds of thousands of years (just very marginally better than anyone else) is bigger news than landing a space laboratory capable of reconstructing the deep history of another planet and searching for evidence of extra-terrestrial life on the surface of a planet 560 million kilometres away? Well done NASA. You deserve all the gold medals today, for an achievement that leaves every olympian, no matter how awesomely superhuman, in the shade.

Knowledge is superior to strength, skill to speed, carefully planned and executed cooperation to isolated brilliance. Yet better even than knowledge is wisdom. Though don't hold your breath for the day that the pursuit of wisdom makes a news headline ahead of a photogenic man running quickly at a corporate-sponsored event. Nonetheless, if Curiosity finds what it is looking for, we'll need plenty of wisdom to grasp it.
She [Wisdom] is more precious than jewels,
    and nothing you desire can compare with her. [...]
She is a tree of life to those who lay hold of her;
    those who hold her fast are called happy.

- Proverbs 3.15, 18 (NRSV).

Friday, July 20, 2012

The virtue of Curiosity and the seven minutes of terror


As a socially-awkward young lad, I grew up reading more than a little sci-fi. For many years, stories of the real life exploits of astronauts just didn't cut it in comparison to the realm of the imagination. Yet as I've come to appreciate a little more of just how complex, demanding and risky working in space actually is, so my respect for rocket science has grown. It is indeed rocket science, after all.

At the same time, I've become increasingly suspicious of pinning any of our hopes on the (for many) cherished dream of one day colonising other planets. Indeed, the two developments reinforce each other. Learning more of the challenges raises both admiration regarding what has been achieved and the barriers to the Star Trek interstellar techno-utopian dream. Not only are interstellar distances staggeringly large, but the technical challenges at every stage are enormous. This video gives a sense of the many difficulties involved in just one step in an operation to get an unmanned rover to our second-nearest planet, a project we've been working on for forty-odd years (with many failures and some stunning success).

I don't begrudge the space programmes their funding. I think Curiosity is a great name for this project; curiosity and wonder are at the heart of knowledge's raison d'ĂȘtre and learning about the cosmos needs no further justification. Furthermore, even from a purely instrumental perspective, NASA's work with satellites looking back at our own planet has been one of the vital ingredients helping us raise our sights from local to global impacts as we've sought to grasp the scale and pace of changes wrought by human activities. So I will be holding my breath in the early hours of 5th August waiting for news of a successful landing (ok, maybe I'll be asleep, but holding my breath in spirit). I too am curious.

But as we seek to understand more about the worlds beyond our world, let's not get carried away by unlikely dreams. Those other wonders of astronomical investigation, telescopes, may have been revealing a growing list of earth-like planets throughout our galaxy over the last few years. Yet the nearest of these, Gliese 581g is still something like 192 trillion km away. At that distance, the fastest space craft we have yet built would take a mere 87,000 years or so to reach it.

For some, the idea of interstellar travel is an inspiring long term goal. In principle, I have no particular problem with this. Yet I get the impression that as the magnitude and proximity of our various ecological threats becomes increasingly apparent to more people, so the dream of escaping from here to start a new life elsewhere has grown. In this form, as potential salvation from our self-inflicted termination, the idea of colonising exo-planets is an illusory psychological defence mechanism, a dangerous distraction from the task of caring for our neighbours and preserving what we can of a habitable world. Yes, perhaps with some currently unimaginable silver-bullet technical breakthrough perhaps we'll be jetting off at significant fractions of the speed of light at some stage. But let us acknowledge that as a way of keeping (a tiny fragment of) the human race alive in a cosmic insurance policy, it is, quite literally, the longest of long shots.

We look to the stars, but our feet remain on the only planet we can realistically inhabit in the timeframes relevant to our self-destructive trajectory.