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arts / rec.arts.sf.written / Re: xkcd: Light Leap Years

SubjectAuthor
* xkcd: Light Leap YearsLynn McGuire
+* Re: xkcd: Light Leap YearsDimensional Traveler
|+* Re: xkcd: Light Leap YearsLynn McGuire
||`- Re: xkcd: Light Leap YearsDimensional Traveler
|`- Re: xkcd: Light Leap YearsJohn Savard
`- Re: xkcd: Light Leap YearsJack Bohn

1
xkcd: Light Leap Years

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From: lynnmcguire5@gmail.com (Lynn McGuire)
Newsgroups: rec.arts.sf.written,rec.arts.comics.strips
Subject: xkcd: Light Leap Years
Date: Wed, 21 Feb 2024 15:23:37 -0600
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 by: Lynn McGuire - Wed, 21 Feb 2024 21:23 UTC

xkcd: Light Leap Years
https://xkcd.com/2897/

No, no, no, no. That is not how things work. Randall is messing with
us again.

Explained at:
https://www.explainxkcd.com/wiki/index.php/2897:_Light_Leap_Years

Lynn

Re: xkcd: Light Leap Years

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From: dtravel@sonic.net (Dimensional Traveler)
Newsgroups: rec.arts.sf.written,rec.arts.comics.strips
Subject: Re: xkcd: Light Leap Years
Date: Wed, 21 Feb 2024 16:52:23 -0800
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 by: Dimensional Traveler - Thu, 22 Feb 2024 00:52 UTC

On 2/21/2024 1:23 PM, Lynn McGuire wrote:
> xkcd: Light Leap Years
>    https://xkcd.com/2897/
>
> No, no, no, no.  That is not how things work.  Randall is messing with
> us again.
>
You say that like you are under the impression the is ever NOT messing
with us....

--
I've done good in this world. Now I'm tired and just want to be a cranky
dirty old man.

Re: xkcd: Light Leap Years

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From: lynnmcguire5@gmail.com (Lynn McGuire)
Newsgroups: rec.arts.sf.written,rec.arts.comics.strips
Subject: Re: xkcd: Light Leap Years
Date: Thu, 22 Feb 2024 01:47:58 -0600
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 by: Lynn McGuire - Thu, 22 Feb 2024 07:47 UTC

On 2/21/2024 6:52 PM, Dimensional Traveler wrote:
> On 2/21/2024 1:23 PM, Lynn McGuire wrote:
>> xkcd: Light Leap Years
>>     https://xkcd.com/2897/
>>
>> No, no, no, no.  That is not how things work.  Randall is messing with
>> us again.
>>
> You say that like you are under the impression the is ever NOT messing
> with us....

Only 50% of the time.

Lynn

Re: xkcd: Light Leap Years

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Subject: Re: xkcd: Light Leap Years
From: jack.bohn64@gmail.com (Jack Bohn)
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 by: Jack Bohn - Thu, 22 Feb 2024 14:55 UTC

Lynn McGuire wrote:
> xkcd: Light Leap Years
> https://xkcd.com/2897/
>
> No, no, no, no. That is not how things work. Randall is messing with
> us again.
>
> Explained at:
> https://www.explainxkcd.com/wiki/index.php/2897:_Light_Leap_Years
>

Interestingly, the radial velocity of the example Proxima Centauri (that is, affecting its distance from the Earth) is given as about 22.345 km/sec.
See, for example:
https://www.aanda.org/articles/aa/full_html/2017/02/aa29930-16/aa29930-16.html

That's about 0.007% of the speed of light. This is swamped by the 0.27% difference in the light leap year, and, in absolute terms, is just past the fourth decimal place, but, next year, when we change the data again, it may be worthwhile to not just reconvert the number, but remeasure to get a new number!

Barnard's runaway star has an even greater value, 110 km/sec, possibly justifying changing its distance value twice every four years.
https://www.britannica.com/place/Barnards-star

I expect further stars would have to have ever greater speeds to keep their distance change a noticeable percentage of their distance. (whereas the change by adding an extra light day to the light year remains constant.) So these are probably the most famous star names that would show such differences.

--
-Jack
(probably my last post through Google Groups)

Re: xkcd: Light Leap Years

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From: dtravel@sonic.net (Dimensional Traveler)
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Subject: Re: xkcd: Light Leap Years
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 by: Dimensional Traveler - Thu, 22 Feb 2024 16:38 UTC

On 2/21/2024 11:47 PM, Lynn McGuire wrote:
> On 2/21/2024 6:52 PM, Dimensional Traveler wrote:
>> On 2/21/2024 1:23 PM, Lynn McGuire wrote:
>>> xkcd: Light Leap Years
>>>     https://xkcd.com/2897/
>>>
>>> No, no, no, no.  That is not how things work.  Randall is messing
>>> with us again.
>>>
>> You say that like you are under the impression the is ever NOT messing
>> with us....
>
> Only 50% of the time.
>
Or some only realize they are being messed with 50% of the time.... ;)

--
I've done good in this world. Now I'm tired and just want to be a cranky
dirty old man.

Re: xkcd: Light Leap Years

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From: quadibloc@servername.invalid (John Savard)
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Subject: Re: xkcd: Light Leap Years
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 by: John Savard - Sat, 24 Feb 2024 06:48 UTC

On Wed, 21 Feb 2024 16:52:23 -0800, Dimensional Traveler
<dtravel@sonic.net> wrote:
>On 2/21/2024 1:23 PM, Lynn McGuire wrote:

>> xkcd: Light Leap Years
>>    https://xkcd.com/2897/

>> No, no, no, no.  That is not how things work.  Randall is messing with
>> us again.

>You say that like you are under the impression the is ever NOT messing
>with us....

Messing with us? I don't think Randall was trying to fool anyone into
thinking that light years changed in length depending on the length of
the current year. This was a joke; the cartoon was intended to make
people laugh!

John Savard

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