The Last POWER1 CPU on Mars Is Dead • Hacker News Board

Re: The Last POWER1 CPU on Mars Is Dead

#141

Post by nekkoru » Wed, Feb 27, 2019, 8:49 AM UTC

marzell wrote: post #56

yingw787 wrote: post #5

Might be O/T, but I found it really interesting how they mention "5,352 Martian solar days". Do we humans have plans in the pipeline for a universal time standard we can use wherever we are? Something that is a little more useful than "seconds since UNIX epoch" but something a little less terrestrial than UTC? Or is time going to be based wherever we land or travel (e.g. divide up Mars into time zones upon colonizati…

Planck Seconds since the Birth of Jesus. Infallible. But seriously, since time is relative, you can only provide it with a reference included. i.e. Planck Seconds since x event (big bang/whatever) from the perspective of y . Similar to the notion of objective velocity... any object is stationary or moving only in reference to something else. Although I think we can get around that if we could get accurate measurement…

When exactly was Jesus born?

Re: The Last POWER1 CPU on Mars Is Dead

#142

Post by hinkley » Wed, Feb 27, 2019, 10:29 PM UTC

omeid2 wrote: post #125

hinkley wrote: post #108

Earlier quoted context omitted.

Leap days are caused by one revolution not being a whole number of rotations. The weird thing with Mars would be that if you contact someone at 5pm local today it might not be okay to call them at the same time tomorrow, because they would clock in 37 minutes later.

> Leap days are caused by one revolution not being a whole number of rotations. Right, a whole 24 hours ;) > if you contact someone at 5pm local today it might not be okay to call them at the same time tomorrow, because they would clock in 37 minutes later. That is assuming that people on mars will have 24hr and 37 min clocks instead of 24hr. The only thing that will be different on Mars would be that the sunrise wil…

Living on Mars in the next 100 years is already going to be hard enough emotionally, biochemically, and thermodynamically, without having a work schedule that changes by 37 minutes every day.

Everything about it, including the great distance, or perhaps especially the great distance says that Earthers will have to make the affordances. I expect anyone on Mars who didn't come through the ranks of the Armed Forces (and half of the ones who did), and any medical, psychological, or political scientist brought in as an advisor, are all going to give a big ol' "Fuck You" to anyone who suggests otherwise.

Re: The Last POWER1 CPU on Mars Is Dead

#143

Post by twodave » Thu, Feb 28, 2019, 11:37 AM UTC

mey wrote: post #30

twodave wrote: post #24

Earlier quoted context omitted.

Well the problem is a "second" is just a unit of rotation of the Earth on its axis. So you'd either need to use some other reference material than a rotating body in space or else use some arbitrary one (like Earth, since that's where we are from!) and choose a reference date (why not use one we're all familiar with? I know! We could use the UNIX epoch!). Even if you did this, your universal time would just be a sync…

It was previously based on rotation of the earth. It was converted to atomic analysis of the caesium atom in 1967. https://en.wikipedia.org/wiki/International_System_of_Units#...

Yes obviously we aren't sitting here measuring the earth's rotation to set our clocks. The point is the meaning of the number remains the same. Seconds, minutes and hours have meaning, and the meaning of those measured amounts of times is directly related to some fraction of the rotation of the planet we are currently sitting on. The point was moving this system of time-keeping to some other planet would discard much of its relevancy to our every-day life, which matters a lot.

Re: The Last POWER1 CPU on Mars Is Dead

#144

Post by twodave » Thu, Feb 28, 2019, 11:39 AM UTC

echlebek wrote: post #34

twodave wrote: post #24

Earlier quoted context omitted.

Well the problem is a "second" is just a unit of rotation of the Earth on its axis. So you'd either need to use some other reference material than a rotating body in space or else use some arbitrary one (like Earth, since that's where we are from!) and choose a reference date (why not use one we're all familiar with? I know! We could use the UNIX epoch!). Even if you did this, your universal time would just be a sync…

That's actually not true if you're using SI units for seconds. "The SI unit of time is the second (s): The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom." I'm not a physicist, but I think that's a universal definition - the rate of the periods should be constant everywhere in the universe. S…

The point wasn't to explain how we measure it or whether it is easy or not, the point is that the unit of measure was selected for its meaning, and that meaning has little relevance on other planets.

Re: The Last POWER1 CPU on Mars Is Dead

#145

Post by omeid2 » Fri, Mar 01, 2019, 3:16 AM UTC

hinkley wrote: post #142

omeid2 wrote: post #125

Earlier quoted context omitted.

> Leap days are caused by one revolution not being a whole number of rotations. Right, a whole 24 hours ;) > if you contact someone at 5pm local today it might not be okay to call them at the same time tomorrow, because they would clock in 37 minutes later. That is assuming that people on mars will have 24hr and 37 min clocks instead of 24hr. The only thing that will be different on Mars would be that the sunrise wil…

Living on Mars in the next 100 years is already going to be hard enough emotionally, biochemically, and thermodynamically, without having a work schedule that changes by 37 minutes every day. Everything about it, including the great distance, or perhaps especially the great distance says that Earthers will have to make the affordances. I expect anyone on Mars who didn't come through the ranks of the Armed Forces (and…

You should read up about people stationed on the poles.