Commit 21232f9e2ccf62f70d2199a3f47cd9a813685e08
Add entry Seasons
Greg K Nicholson committed on 4/21/2018, 3:32:42 PMParent: fb012f7e00f1b895de8756242d4e6eb0d5bb028f
Files changed
| content/seasons.md | changed |
| content/seasons.md | |||
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| @@ -1,7 +1,7 @@ | |||
| 1 | 1 … | --- | |
| 2 | 2 … | title: Solstice, equinox, perihelion and aphelion calendar, 2000 to 2100 | |
| 3 | -date: 2018-03-30 19:36 | ||
| 3 … | +date: 2018-04-21 16:17 | ||
| 4 | 4 … | ||
| 5 | 5 … | tags: calendar, solstice, equinox, perihelion, aphelion | |
| 6 | 6 … | ||
| 7 | 7 … | links: | |
| @@ -25,17 +25,18 @@ | |||
| 25 | 25 … | that shows the solstices and equinoxes | |
| 26 | 26 … | without a load of extra messy stuff, | |
| 27 | 27 … | and doesn't expire in the next few years. | |
| 28 | 28 … | ||
| 29 | -The Astronomical Applications Department of the United States Naval Observatory | ||
| 29 … | +Luckily, | ||
| 30 … | +the Astronomical Applications Department of the United States Naval Observatory | ||
| 30 | 31 … | generously makes a lot of astronomical data available | |
| 31 | 32 … | [in such a way that it can be gathered and manipulated easily][api], | |
| 32 | -and [they allow the data to be reused freely][reuse]. | ||
| 33 … | +with [free permission to reuse the data][reuse]. | ||
| 33 | 34 … | ||
| 34 | 35 … | [api]: http://aa.usno.navy.mil/data/docs/api.php#seasons | |
| 35 | 36 … | [reuse]: http://aa.usno.navy.mil/about/staff/docs/PrivacyNotice.php "“All information on this site is considered public information and may be distributed or copied unless otherwise specified.”" | |
| 36 | 37 … | ||
| 37 | -So, I've downloaded the data for the entire 21st century, | ||
| 38 … | +So I've downloaded the data for the entire 21st century, | ||
| 38 | 39 … | and converted it into iCalendar format. | |
| 39 | 40 … | It's a simple plain text format, | |
| 40 | 41 … | so I was able to do this manually with plenty of find-and-replace. | |
| 41 | 42 … | ||
| @@ -45,10 +46,15 @@ | |||
| 45 | 46 … | * the two equinoxes in March and September | |
| 46 | 47 … | * the perihelion in January | |
| 47 | 48 … | * the aphelion in July | |
| 48 | 49 … | ||
| 49 | -To subscribe, point your calendar program at | ||
| 50 … | +To subscribe or import the data, point your calendar program at | ||
| 50 | 51 … | [https://gkn.me.uk/seasons/seasons.ics](/seasons/seasons.ics). | |
| 51 | 52 … | Or, going to [webcal://gkn.me.uk/seasons/seasons.ics](webcal://gkn.me.uk/seasons/seasons.ics) | |
| 52 | 53 … | may prompt your web browser to send this URL to your calendar program, | |
| 53 | 54 … | depending on how co-operative all the software on your computer is. | |
| 54 | 55 … | ||
| 56 … | +The calendar's contents won't change: | ||
| 57 … | +it's unlikely that new observations would make the data obsolete, | ||
| 58 … | +(perhaps an inconsequential minute or two either way,) | ||
| 59 … | +and I don't expect to have any personal use for data beyond 2100. | ||
| 60 … | +Someone else will have to fulfil your 22nd-century calendar needs. | ||
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