Image at right: Steve Squyres of Cornell uses a small boom for translation activities.
Today was Day 4 of our mission and it was a challenging one. As usual,the action was centered around the “EVAs”, or extra-vehicular activities inNASA parlance – our simulated space walks.
We had two different kinds of activities in today’s EVAs. One of themwas very slow, very methodical, and very effective. Imagine a long telescopingpole – we called it a boom – with big heavy magnets on each end. We used thisboom to get around on the simulated asteroid surface (i.e., the sea floor),moving like an inchworm.
It goes like this: Fasten both magnets to anchor points on the surface.Unfasten one and move to it to a new anchor point. Fasten it. Unfasten theother one and move it to a new anchor point… and repeat as necessary. It wasslow, but it got us to where we wanted to go pretty reliably.
Once we arrived at our destination, the boom was great. It’s hard to dothings like hit a rock with a hammer in zero-g without going flying. But withthe boom solidly in place, we could wrap our legs around it and whack away atthe rock pretty easily. So a boom could be a good technique for geologists touse to get work done on an asteroid, I think.
The other part of the EVA was totally different… jet packs! We hadbattery-powered thruster packs on our backs that we could use to move veryquickly and easily from one place to another. And yeah, I have to confess, itwas every bit as much fun as it sounds like it was. Quick, easy, and very cool.Problem was, once we arrived at our destination with ajob to do, staying in place was a lot harder.
Sometimes the best answer to a complicated problem is to use somecombination of techniques. So one way I could see this going might be thatastronauts would use jet packs to move long distances over an asteroid surface,and then a boom for smaller motions and getting work done.
Or maybe they’ll use something completely different! It’s only Day 4 ofthe mission, and we’ve got a lot more techniques to try… so we’ll see.