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Comment Re:Can't keep putting everything on our credit car (Score 2, Interesting) 288

But there is just one problem is equating this with NASA. NASA has, AFAIK, never done any research into deflecting asteroids and has never implemented or even proposed such a program.

Thought I'd do some checking on this and share with the class:
B612 Foundation

We've been anticipating the conclusion of a contract we issued to Jet Propulsion Laboratory in early 2008, and it's now available. We asked JPL to analyze, in detail, the performance of a transponder equipped gravity tractor (t-GT) in determining the precise orbit of a NEO with which it has rendezvoused, and to evaluate the towing performance of the GT per se.

And elsewhere on their site:

NASA's NEO Report to Congress (see #15 below) has stirred considerable controversy due to both its rejection of Congress' request for a recommended program to support the new Spaceguard Survey goal and it's technically flawed deflection analysis. The analytic work supporting the summary report to Congress is being withheld from public review by NASA despite it having been published as a 3-color glossy "Final Report" and distributed internally.

The sky is falling, really:

The bad news? While this all looks fine on paper, scientists haven't had a chance to try it in practice. And this is where NASA's report was supposed to come in. Congress directed the agency in 2005 to come up with a program, a budget to support it and an array of alternatives for preventing an asteroid impact.

But instead of coming up with a plan and budget to get the job done, the report bluntly stated that "due to current budget constraints, NASA cannot initiate a new program at this time."

Why did the space agency drop the ball? Like all government departments, it fears the dreaded "unfunded mandate." Congress has the habit of directing agencies to do something and then declining to give them the money to do so. In this case, Congress not only directed NASA to provide it with a recommended program but also asked for the estimated budget to support it. It was a left-handed way for the Congress to say to NASA that this is our priority like it or not. But for some reason NASA seems to have opted for a federal form of civil disobedience.

I think this ties in with NASA's, and specifically Administrator Griffin's, emphasis on manned missions over unmanned missions. I hope Obama replaces the man. Because, not having a space mission is a good excuse for the dinosaurs, we can't use that one.

Comment Re:Correlation (Score 1) 570

Although I know many over thirtys who disagree, many younger people often do not consider it impolite to receive and send text messages in public or with company (within reason, it can't distract you completely).

But isn't the value of text messaging over voice calls is that you don't need to interrupt social conversations? I'll wait until the conversation is over before I check my text message. Why is it that people, even younger people (whatever the cut off for that is), feel like they must always act at the behest of their cell phones?

For me, when I send a text message, that implies that you needn't respond to it right away but at your soonest conveniance. I wonder if what you're speaking of isn't so much that they don't consider it impolite to interrupt a conversation to check their text message, but that they consider it a greater offense to not respond to a text message right away. I hope, later on in their lives, they learn to lose this habit quick unless you want to live as a stress ball for the rest of your life. For me, text messages isn't just more conveniant, safer (for driving), but also saves stress because you *don't* have to answer it right away.

And that's the biggest thing about cell phones. With landline phones, it was considered improper to ignore a phone call because it could be something important. But with cell phones, since we carry them everywhere we go, we have to learn to let go and not let it control us.

Comment The real news (Score 1) 67

I think the real news is that the M3 is working and is confirming the results of other moon missions. This isn't so much important for double-checking that there really *is* iron on the moon, but more double-checking that the M3 is working and providing correct information. If the M3 sent back information that the moon's surface was composed of cheese-oxide, they'd probably want to recheck their instruments.

One thing I would like to know is whether this is iron ore that can be processed by a future lunar factory into metal? But the other interesting thing is that it looks like the mission of the M3 is to create a high-resolution mineral map of the moon, which is interesting to me as this would be very useful for possible exploitation of lunar resources in the future.

Anyway, I haven't heard of this mission before (sorry, I've only started to get back interested in astronomy recently) but I'm glad they're doing it.

Here's some links I've found:

NASA's page on the M3
A Space Spin article
Wikipedia on Chandrayaan

Also, from TFA:

"Obviously many missions before have found iron, but Chandrayaan-1 has reiterated the presence. We believe it is very significant because the mission has already fulfilled one of its objectives, which was to sight minerals. More is to come and it should be exciting if we can confirm the presence of uranium and other minerals,'' said an ISRO official.

Which would be extremely cool if we found uranium on the moon because of the possibility of nuclear energy on the moon. I know, we'll probably only exploit solar at first with the future lunar outpost, but still neat.

(BTW, I'm basically just spilling the thoughts that I'm sure anyone else is having when they read this stuff, I'm sure others will correct whatever mistaken thoughts I have.)

Comment Re:Build more bicycles.. (Score 1) 897

My sense is that the culture is very different here in the states, people generally frown on bicycles and there are too many rednecks who will think it will be funny to run someone off the road because they're riding a bicycle. Remember, it's a two lane highway, if someone's in the other lane they can't pass, there isn't much shoulder room. This is enough to put someone in a bad mood.

Yeah, technically a cyclist has the same rights as an automobile, but the reality is different. I won't want to have to sue someone from a wheelchair, even if I win the lawsuit.

Comment Re:Yeah, the economic math doesn't work (Score 1) 275

You mean an orbit where the sun is always in view? Is that possible? It just seems that such an orbit would be way too slow and would fall into the atmosphere, as wouldn't it need to orbit the earth once per solar year?

Additionally, I don't know if a geostationary orbit is required or not, so that the energy beam doesn't need to move.

Comment Re:Yeah, the economic math doesn't work (Score 1) 275

Benefits - how much energy can an orbital solar array produce, relative to the same size solar array on Earth? About twice as much - it's lit for 24 instead of 12 hours.

But doesn't this depend on the orbit? More exactly, doesn't this depend on the distance the orbit is from the earth? The higher your orbit, the less time you have in the earth's shadow. Consider the moon's orbit, which is much higher than we need, but consider how often the moon falls into the earth's shadow. When was the last lunar eclipse you've seen?

Comment Re:Tough choice (Score 1) 259

No, no I can't. I can, however, look them in the eye and say that removing any amount of genetic material or replacing it can have unexpected results. I'm not a biologist of any sort but we still don't have a full understanding of the human genome. Mapping, sure, but we're largely ignorant of what everything does.

I'm just wondering where the finish line is to this sort of thought process. We don't have a full understanding of the human genome, you say, so when, and by what means, do you think that is going to be accomplished? Or what if we never have a full understanding of the human genome, which is what I think most people who say this sort of thing suspect. But, even with technology that we have totally mastered, like electricity, superconductors, or baking bread, in no case can we say we have a full understanding.

And all of this distracts from the reality that even if no amount of genetic material is removed or replaced, you're still going to have unexpected results. "Nature", as it happens, is full of suprises and some really awful jokes; and we make do. It just surprises me that when we make real progress at being able to control nature, someone pops up thinking that because we don't have godly omniscience that we're just going to make things worse. As if the only thing that human beings and our technology can do is make things worse. It's a very old prejudice, but one that can no longer leave unchallenged.

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