mikegarrison Posted February 4, 2016 Share Posted February 4, 2016 When you go to university, things will be different. (Or if they aren't, they you went to the wrong university!) One of my professors was on the review board of the Challenger accident investigation and came back and gave our department (aeronautics and astronautics) a lecture about it that I attended. Later, after I had left school, another one of my professors was on the Columbia accident investigation board. So you see, university can be lot different. Link to comment Share on other sites More sharing options...
YNM Posted February 4, 2016 Share Posted February 4, 2016 8 hours ago, wumpus said: There isn't much help for EMI-safety issues. Simple explanation: wear sunscreen when outside: sunlight is by far the most dangerous radiation you will ever face (might not be true for pilots/flight crew, but that is just *different* solar radiation. Still true for submariners manning the nukes). Also if you see big antennas with high fences and "no trespassing" signs, stay out: it is quite possible there is lethal EMI around there (more than a simple computation of power vs. power down would include). In depth explanation: pretty much needs the Maxwel equations and complete solution breaking down radiation (EM waves) and inductive coupling (the dangerous but short range stuff). Just where are you going to find a radiophobe that can deal with differential equations, let alone a high level EE class. Probably only if you live there all the time, or starts to climb it. If anything, guess it goes to the microwave - wi-fi jokes. 3 hours ago, magnemoe said: Did the group use mobile phones? That is the key question. Yes of course. They're not radiophobes, they're just fact ignorant, blissfully retells anything they read there. Link to comment Share on other sites More sharing options...
fredinno Posted February 4, 2016 Share Posted February 4, 2016 2 hours ago, cubinator said: Let the people be ignorant. Be patient, and work towards whatever goal you pursue, and you will eventually rise above those who have already chosen to stay behind. Space exploration is extremely important to modern life. Take away all our GPS devices, satellite TV, weather predictions, and countless other technologies and suddenly people would come crying to NASA and others begging that all these technologies that they have become so dependent on be brought back. Those who don't realize the importance of space travel on the way we live our lives today are just as ignorant as the flat-earthers or the moon landing denialists. Unfortunately, there will still be people like that towards space exploration until they see an economic opportunity in it. This will likely come with the creation of affordable asteroid mining. That technology will come from those of us who take time and effort today to make it possible. Until the day when the truth is so close to their faces that they have to shut up, we must ignore them and keep on going. Don't let the present keep you from the future. I think it's more likely to be space tourism and then space mining and manufacturing (and services, to service everyone else) in that order. But that's just me. 3 hours ago, magnemoe said: Did the group use mobile phones? That is the key question. Note that some people thought the martian was based on an real story. Missing the first manned Mars landing would be hard, ...Those people realize that if a Mars Manned Landing happened, they probably would have known? Link to comment Share on other sites More sharing options...
Bill Phil Posted February 4, 2016 Share Posted February 4, 2016 21 hours ago, WestAir said: I thought there were more rocks past Pluto than in the main belt? Edit: I'm hoping I'm right - otherwise I might as well be one of those kids in your class. Idk of they're rocks, per se. Rocky objects tend to be in the inner solar system. I'd bet on icy materials. Link to comment Share on other sites More sharing options...
Gaarst Posted February 4, 2016 Share Posted February 4, 2016 (edited) Are we really doing one of those "we are so superior because we know stuff about space/physics/science that other don't because they have no interest in it at all" thread again ? I don't care about, say XVIth century geopolitics, and I'm perfectly happy not knowing anything about it and not being forced to learn some useless facts that I will never use in my everyday life; even if historians are going to take me for a fool because it is actually so important to the world powers balance for centuries up to today. I'm wondering what would a history/economics/politics forum think about us, doing nothing but stargazing and so far from the real world's problems, or so ignorant about how the world and our society works... Edited February 4, 2016 by Gaarst Link to comment Share on other sites More sharing options...
Bill Phil Posted February 4, 2016 Share Posted February 4, 2016 It becomes a problem if what's being taught is incorrect. It doesn't have to be the whole truth, no, but at least correct. Link to comment Share on other sites More sharing options...
insert_name Posted February 4, 2016 Share Posted February 4, 2016 1 minute ago, Gaarst said: Are we really doing one of those "we are so superior because we know stuff about space/physics/science that other don't because they have no interest in it at all" thread again ? I don't care about, say XVIst century geopolitics, and I'm perfectly happy not knowing anything about it and not being forced to learn some useless facts that I will never use in my everyday life; even if historians are going to take me for a fool because it is actually so important to the world powers balance for centuries up to today. I'm wondering what would a history/economics/politics forum think about us, doing nothing but stargazing and so far from the real world's problems, or so ignorant about how the world and our society works... speak for your self, I'm fairly up to date on history/economics/politics as well Link to comment Share on other sites More sharing options...
Camacha Posted February 4, 2016 Share Posted February 4, 2016 10 minutes ago, Gaarst said: Are we really doing one of those "we are so superior because we know stuff about space/physics/science that other don't because they have no interest in it at all" thread again ? Yes, we are. Apparently, we are special snowflakes. Link to comment Share on other sites More sharing options...
Matuchkin Posted February 4, 2016 Share Posted February 4, 2016 My class textbook, teacher, etc says that all the asteroids orbit between Mars and Jupiter. The class blindly agrees. They clearly do not even know about the Kuiper Belt and the HUUUUUGE Oort cloud. Link to comment Share on other sites More sharing options...
Camacha Posted February 4, 2016 Share Posted February 4, 2016 14 minutes ago, Matuchkin said: My class textbook, teacher, etc says that all the asteroids orbit between Mars and Jupiter. The class blindly agrees. He is mostly right, certainly from out perspective We even call it The Asteroid Belt, almost as if there are no others. Link to comment Share on other sites More sharing options...
mikegarrison Posted February 4, 2016 Share Posted February 4, 2016 It kind of depends on the definition of "asteroid". Most of the Oort cloud objects are more ice than rock (we think). So do they count? What makes a comet different from an asteroid? Is it the trajectory? The composition? We could just say that by definition an asteroid must have an orbit that lies between the orbits of Mars and Jupiter, but what about all the rocks flying around that are in other orbits? What would we call them? This sort of thing is why Pluto got reclassified into a "Dwarf Planet".... Link to comment Share on other sites More sharing options...
YNM Posted February 4, 2016 Share Posted February 4, 2016 In terms of mass, Asteroid Belt is more likely to win. In terms of count, though, of course it's not gonna win. Link to comment Share on other sites More sharing options...
Camacha Posted February 4, 2016 Share Posted February 4, 2016 31 minutes ago, YNM said: In terms of mass, Asteroid Belt is more likely to win. In terms of count, though, of course it's not gonna win. I thought the same about the mass thing, but apparently the Oort Cloud is between 4 and 80 Earth masses, and the asteroid belt only a fraction of the Moon. 42 minutes ago, mikegarrison said: This sort of thing is why Pluto got reclassified into a "Dwarf Planet".... It is not. Asteroids have been pretty clearly defined for a while now. No one ever said they have to be between Mars and Jupiter. That is just a certain groups of asteroids, one that is also most prominent from our location and view. Link to comment Share on other sites More sharing options...
YNM Posted February 4, 2016 Share Posted February 4, 2016 (edited) @ Camacha : Hmm... For Oort cloud, total mass isn't the concern (as you can totally set arbitrarily huge number, like, 3 ly for it's radius, which certainly will be massive). Main concern are density, because in this way we can tell how they'll deviate the way things work inside the solar system. There's something named Oort limit or so for this - not sure though, I read it in the double-disk dark matter paper. Edited February 4, 2016 by YNM Link to comment Share on other sites More sharing options...
GeneralVeers Posted February 4, 2016 Share Posted February 4, 2016 On 2/3/2016 at 7:25 PM, JPmAn said: This serves a reminder of how little other people care about each other. Don't read too much into that. Some people are dirtbags, there is no doubt. Problem is (well, this actually isn't a problem per se, but you'll see what I mean in a second) the people who are not dirtbags have generally been taught actual manners at some point in their lives, which means they were taught not to get into arguments and fights, regardless of whether it's for the right reasons. So probably a bunch of other people in the room wanted to stick up for you or punch teeth out of the mouth who belittled the deaths of brave astronauts (I prefer the second one) but decided to keep quiet. True, you can't be sure how many people in the room felt this way, but you shouldn't assume all people are dirtbags just because some of them are. Link to comment Share on other sites More sharing options...
WestAir Posted February 4, 2016 Share Posted February 4, 2016 12 hours ago, Bill Phil said: Idk of they're rocks, per se. Rocky objects tend to be in the inner solar system. I'd bet on icy materials. Can I claim semantics on this one? I meant "more bodies of orbiting mass" Link to comment Share on other sites More sharing options...
worir4 Posted February 4, 2016 Share Posted February 4, 2016 13 hours ago, Gaarst said: Are we really doing one of those "we are so superior because we know stuff about space/physics/science that other don't because they have no interest in it at all" thread again ? I don't care about, say XVIth century geopolitics, and I'm perfectly happy not knowing anything about it and not being forced to learn some useless facts that I will never use in my everyday life; even if historians are going to take me for a fool because it is actually so important to the world powers balance for centuries up to today. I'm wondering what would a history/economics/politics forum think about us, doing nothing but stargazing and so far from the real world's problems, or so ignorant about how the world and our society works... The problem is not that people don't have interest, it is that they state things that are wrong. eg. 'space flight does not benefit humanity' Or 'Challenger was the same as Columbia'. People say this not because they have formulated an argument with evidence but because they don't know what has been accomplished and the current uses. The equivalent would be some one who does not know much about subject 'X' claiming that said subject is unimportant, again not from a rational argument but from ignorance of the subject. Link to comment Share on other sites More sharing options...
Gaarst Posted February 4, 2016 Share Posted February 4, 2016 @Bill Phil @worir4 I agree, a difference should be made between not knowing and knowing wrong. But reading this thread (and the previous ones) left me with the impression that some don't bother making this difference and make the whole thing sound extremely condescending towards others, with no distinction whatsoever. Link to comment Share on other sites More sharing options...
wumpus Posted February 4, 2016 Share Posted February 4, 2016 14 hours ago, YNM said: Probably only if you live there all the time, or starts to climb it. If anything, guess it goes to the microwave - wi-fi jokes. Yes of course. They're not radiophobes, they're just fact ignorant, blissfully retells anything they read there. Note: I wasn't kidding when I mentioned the difference between radiation and inductive coupling. RF can get *suddenly* dangerous within one wavelength of the antenna. Don't mess with high power things if you don't know quite a bit about *that*specific*installation. Note that most of these issues are for things near the radio-TV range (wavelength in meters) (not sure where/if TV is broadcast now, but FM hasn't moved yet), simply because microwave is too small to get that close. There are dangers. The ones that aren't sunshine are just pretty specific and easily walled off (i.e. not consumer gear), don't go barging around protected areas because you think the signs are to scare off radiophobes. (I think I may have gotten some of this second hand beaten into me from an old [and extremely senior] navy chief I used to work with who saw a sailor die this way on his first trip at sea). Link to comment Share on other sites More sharing options...
peadar1987 Posted February 4, 2016 Share Posted February 4, 2016 Don't worry, things get better after school. The muppets will either grow up and turn into decent human beings, or end up in a horrible soul-crushing dead end job miles away from you. Link to comment Share on other sites More sharing options...
Evanitis Posted February 4, 2016 Share Posted February 4, 2016 (edited) I'm slightly offended in the name of decent human beings in horrible soul-crushing dead end jobs thousands of miles away from you. Edited February 4, 2016 by Evanitis Link to comment Share on other sites More sharing options...
fredinno Posted February 4, 2016 Share Posted February 4, 2016 (edited) 17 hours ago, mikegarrison said: When you go to university, things will be different. (Or if they aren't, they you went to the wrong university!) One of my professors was on the review board of the Challenger accident investigation and came back and gave our department (aeronautics and astronautics) a lecture about it that I attended. Later, after I had left school, another one of my professors was on the Columbia accident investigation board. So you see, university can be lot different. Like Yale University? https://www.youtube.com/watch?v=9IEFD_JVYd0 Edited February 4, 2016 by fredinno Link to comment Share on other sites More sharing options...
mikegarrison Posted February 4, 2016 Share Posted February 4, 2016 8 minutes ago, fredinno said: Like Yale University? https://www.youtube.com/watch?v=9IEFD_JVYd0 Well, I went to MIT. But we had our own shouting matches there, sometimes. I was there right at the peak of the "divest from South Africa" movement. Link to comment Share on other sites More sharing options...
Camacha Posted February 4, 2016 Share Posted February 4, 2016 (edited) 28 minutes ago, fredinno said: Like Yale University? https://www.youtube.com/watch?v=9IEFD_JVYd0 Is that not the height of political correctness and civility? One party asks the other party to be mindful of their actions, the other party feels restricted by this and protests the former's request. Someone actually in charge comes in to debate with the students, which he then exhaustively does. Even though opinions continue to differ and the discussion gets heated, no physical confrontation arises. The most aggressive act is one of walking away. The school administrator remains calm in explaining his point of view, the less experienced student - in university to learn about things exactly like these - gets slightly over-exited. She probably learned a valuable lesson that will serve her later in life. If every confrontation in the real world would be handled like this, we would be living in a very nice and neat world. Edited February 4, 2016 by Camacha Link to comment Share on other sites More sharing options...
fredinno Posted February 4, 2016 Share Posted February 4, 2016 3 minutes ago, Camacha said: Is that not the height of political correctness and civility? One party asks the other party to be mindful of their actions, the other party feels restricted by this and protests the former's request. Someone actually in charge comes in to debate with the students, which he then exhaustively does. Even though opinions continue to differ and the discussion gets heated, no physical confrontation arises. The school administrator remains calm in explaining his point of view, the less experienced student - in university to learn about things exactly like these - gets slightly over-exited. She probably learned a valuable lesson that will serve her later in life. If every confrontation in the real world would be handled like this, we would be living in a very nice and neat world. It would also be one without any dissenting, new or innovative ideas; ie. a stagnating one. And Yale MAY be the height of PC culture. Not sure, but really, they're pretty darn high up the rank. Link to comment Share on other sites More sharing options...
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