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To: decimon
Before his death, Regiomontanus published an almanac containing astronomical tables covering the years 1475-1506. Regiomontanus' almanac turned out to be of great value, for his astronomical tables provided detailed information about the sun, moon and planets, as well as the more important stars and constellations by which to navigate. After it was published, no sailor dared set out without a copy. With its help, explorers were able to leave their customary routes and venture out into the unknown seas in search of new frontiers.

Columbus, of course, had a copy of the Almanac with him when he was stranded on Jamaica. And he soon discovered from studying its tables that on the evening of Thursday, Feb. 29, 1504, a total eclipse of the moon would take place soon after the time of moonrise.

Would a lunar eclipse in Europe be visible in Jamaica?

8 posted on 02/10/2008 5:04:45 PM PST by gitmo (From now on, ending a sentence with a preposition is something up with which I will not put.)
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To: gitmo
Would a lunar eclipse in Europe be visible in Jamaica?

From the article, and the part you quoted, I think the almanac was usable in more than Europe. But then, I thought Regiomontanus was a football player so what do I know?

10 posted on 02/10/2008 5:17:40 PM PST by decimon
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To: gitmo

The almanac was useful to (and used by) seafarers, so one can fairly conclude it was not restricted only to lunar eclipses visible in Europe.


11 posted on 02/10/2008 5:26:07 PM PST by Petronski (I didn't leave the GOP. The GOP left me.)
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To: gitmo
>>>Would a lunar eclipse in Europe be visible in Jamaica? <<<

I think eclipses generally track a path across the surface of the earth as it turns on its axis. So some eclipses would be visible in both places - depending on time of year and [maybe] phase of moon.

Kepler would know.

12 posted on 02/10/2008 5:28:13 PM PST by HardStarboard (Take No Prisoners - We're Out Of Qurans)
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To: gitmo

I pulled up Skymap and here’s what I got:

Site information
Latitude: 18° 0’ 0” N
Longitude: 77° 0’ 0” W
Height above sea level: 10 metres
Time zone: 5h behind UT

Visibility
The eclipse is partially visible from this location.
Circumstances of the Eclipse
Moon enters penumbra: 1504 Feb 29 16:48:50
Moon enters umbra: 1504 Feb 29 17:57:03
Start of totality: 1504 Feb 29 19:15:50
Maximum eclipse: 1504 Feb 29 19:40:19
End of totality: 1504 Feb 29 20:04:44
Moon leaves umbra: 1504 Feb 29 21:23:30
Moon leaves penumbra: 1504 Feb 29 22:31:51


16 posted on 02/10/2008 6:02:51 PM PST by scrabblehack
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