NASA Will Go Metric On the Moon 695
An anonymous reader writes "Space.com is reporting that NASA has decided to use the metric system for its new lunar missions. NASA hopes that metrication will allow easier international participation and safer missions. The loss of the Mars Climate Orbiter was blamed on an error converting between English units and metric units. 'When we made the announcement at the meeting, the reps for the other space agencies all gave a little cheer,' said a NASA official."
Re:Yay!!! (Score:5, Informative)
Good start (Score:5, Informative)
According to wikipedia, As of 2005 only three countries, the United States, Liberia, and Myanmar (Burma) [wikipedia.org] have not converted to metric yet. Canada officially converted in 1970, but both systems get used on a day-to-day basis. Most tape measures, rulers, etc have both systems. Most older people still use imperial for most things, and younger generations seem to be mixed.
It's actually interesting that a lot of people here (Canada) use mixed units. Personally, I usually use feet if I'm estimating a distance (it's just a very convienient size - the closest metric equivalent is a decimeter, just doesn't quite cut it), and pounds and feet/inches for human weight/height. We still order a pound of wings and a pint of beer (I think you get beat up if you ask for 568mL of beer in a bar). Most other things are metric: road signs are km/h, the weather report is in celcius. Most stores sell things by the kilogram, meter, or liter/milliliter. I'm not sure what they teach kids in school now, but my generation (mid 20's) seems to be decently fluent in both systems (I remember learning how to add inches as part of learning fractions).
They weren't using metric?! (Score:5, Informative)
We must strike now, before it is to late (Score:5, Informative)
Re:Good start (Score:3, Informative)
Re:Necessary but difficult (Score:3, Informative)
When you are in an industry that uses a standard, you can't be the sole guy using a different standard.
Re:Metric system is not just for scientific commun (Score:4, Informative)
Re:American metric system (Score:3, Informative)
Actually it's more like 60+ years. Originally the "English" and Imperial inches were slightly different. The 25.4 mm inch was a compromise between the two values, so as to ensure that parts manufactured for the war (WWII) effort would actually fit.
Re:Necessary but difficult (Score:4, Informative)
As more modern NC equipment trickles down to the smaller shops that form of the base of American manufacturing the problem is getting less severe because it's as easy to programming a few lines to switch to metric or pressing a button on digital measuring equipment. I wouldn't hold my breath though.
Re:Yay!!! (Score:2, Informative)
Re:Another pointless "victory" (Score:3, Informative)
If you had ever done anything like engineering work you would realize just how stupid the Imperial/SAE system[s] is (are). When we do engineering work here in the states we use decimal inches anyway. 1/8" is never referred to as 1/8" on a blueprint for some bracket or something; it's always 0.125 inches. This just makes the whole thing confusing and so it makes much more sense just to finally go metric. Besides, frankly, a lot of people (including myself) have a hard time remembering how many cups in a pint, or how many volkswagens in a LOC, or how many quarts in a jeroboam... The metric system is simple and logical.
Personally I seldom have a reason to measure anything but volume with SAE measurements. I seldom measure weight anyway (I don't even want to know what I weigh most of the time) and I've sworn off American cars since they're not worth buying anyway - although I guess a number of the new ones have gone metric, aside from certain things which are SAE even on Japanese cars - namely spark plugs (SAE flats, metric thread, this is typical for most spark plugs the world over) and the oil drain plug (which could have either metric or SAE thread, but which almost always has SAE flats.)
When will the rest of the US follow? (Score:2, Informative)
Re:Yay!!! (Score:4, Informative)
Absolutely! I also don't know why we used such an awkward value for PI. It would make much more sense if PI = 1.
On the other hand, I've always liked the idea of lunar months. Thirteen months of 28 days makes a lot more sense than twelve months that are anywhere from 28 to 31 days long.
Re:Yay!!! (Score:4, Informative)
There are two problems with changing to metric time.
1) The year does not fit neatly into a base-10 meter. You can do 36 tendays in a year, but there's still five days left to factor in, aside from the fact that 36 isn't really close to an exponentially-derived value of ten. This is the minor one, since the original 12 months of 30 days each didn't fit neatly into an actual year, either.
2) Redefining the second means redefining a significant number of constants. The speed of light, for example, would go from 299,792.452 km/s to 259,020.684 km/s. That requires redefining the meter, which leads to redefinitions of even more things, and reprogramming vast amounts of software that makes use of these conversions. The short-term chaos probably would not be worth it.
Re:American metric system (Score:3, Informative)
Um. Imerial measurements are more like "hm. This is the size of a thumb. And that's the size of my foot." which is actually quite variable. The metric system is created with the idea to use a base that isn't variable. (as the speed of light.) Ofcourse, now you have agreements of how long one or the other is making it an common system (my foot is larger then yours. Whose measurements are we going to take?) but the irony remains that it's based on the metric system to define it.
The meter is the length of the path travelled by light in vacuum during a time interval of 1/299 792 458 of a second [nist.gov]
As a kilo is a cubic decimeter or 1 liter of water.
100C = boiling point of water
0C = melting point of water
and so on
Re:Hopfuly this is a trend (Score:4, Informative)
Translation: PC Load Letter == (Score:3, Informative)
No one has actually answered this legitimate question.
"PC LOAD LETTER" ==> (P)rint (C)artridge, (Load Letter) Sized Paper now!"
"PC LOAD LETTER" ==> (P)rint (C)artridge, (Load Letter) Sized Paper now!"
"PC LOAD LETTER" ==> (P)rint (C)artridge, (Load Letter) Sized Paper now!"
"PC LOAD LETTER" ==> (P)rint (C)artridge, (Load Letter) Sized Paper now!"
"PC LOAD LETTER" ==> (P)rint (C)artridge, (Load Letter) Sized Paper now!"
There's only 14 characters on the display, what should it say? "Put In Paper?" Where? The obvious place, of course. Stupid wording, but once you know what it means, it's obvious.
I RTFM.
Beer (Score:3, Informative)
In pints.
Note however that these are not pints as you know them. Not the pitiful 473ml servings that pass for pints in the colonies. Oh no. One proper pint is 568ml.
This may be why we've never quite gone for the metric system here. We'd end up being served beer in 500ml glasses and that simply won't do. That extra 68ml is important, even if in most pubs it just accounts for the head...
non-metric units make my brain hurt (Score:4, Informative)
Hold on a minute--I always thought that a pound was a pound was a pound, and that a "Troy ounce" was different from a "normal ounce" (1/12 of a pound vs 1/16 of a pound). Now, becaus of you and Wikipaedia I now know that not only are the ounces different AND the number of ounces in each pound are Different, but the size of each pound is different too!
Even more perverse--a Troy Oz is HEAVIER than a normal ox, but a Troy pound is LIGHTER than a normal pound!
It's no wonder y'all down there in the US crash your space probes into planets.
Re:Imperial Staying Power (Score:2, Informative)
As a note, I do the same thing with height - estimate to the nearest 5cm.