APOD: All the Eclipses of 2017 (2017 Dec 07)

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APOD: All the Eclipses of 2017 (2017 Dec 07)

Postby APOD Robot » Thu Dec 07, 2017 5:08 am

Image All the Eclipses of 2017

Explanation: As seen from planet Earth, all the lunar and solar eclipses of 2017 are represented at the same scale in these four panels. The year's celestial shadow play was followed through four different countries by one adventurous eclipse chaser. To kick off the eclipse season, at top left February's Full Moon was captured from the Czech Republic. Its subtle shading, a penumbral lunar eclipse, is due to Earth's lighter outer shadow. Later that month the New Moon at top right was surrounded by a ring of fire, recorded on film from Argentina near the midpoint of striking annular solar eclipse. The August eclipse pairing below finds the Earth's dark umbral shadow in a partial eclipse from Germany at left, and the vibrant solar corona surrounding a totally eclipsed Sun from the western USA. If you're keeping score, the Saros numbers (eclipse cycles) for all the 2017 eclipses are at bottom left in each panel.

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BDanielMayfield
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Re: APOD: All the Eclipses of 2017 (2017 Dec 07)

Postby BDanielMayfield » Thu Dec 07, 2017 6:41 am

Is four the minimum number of eclipses of all types that can occur in one calendar year? I seem to recall that solar eclipses can be bracketed by lunar eclipses both two weeks before and after the solar.

Bruce
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Re: APOD: All the Eclipses of 2017 (2017 Dec 07)

Postby Boomer12k » Thu Dec 07, 2017 9:05 am

Interesting to see the different types all at one time...

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Re: APOD: All the Eclipses of 2017 (2017 Dec 07)

Postby Calkin » Thu Dec 07, 2017 9:05 am

The "Saros Numbers" hyperlink seems incorrect and does not take one to another webpage ?

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Re: APOD: All the Eclipses of 2017 (2017 Dec 07)

Postby Indigo_Sunrise » Thu Dec 07, 2017 12:20 pm

Calkin wrote:The "Saros Numbers" hyperlink seems incorrect and does not take one to another webpage ?

I was just going to say this. It appears the date is missing a digit.

It's very cool that one individual was able to travel to each of those places to capture these images! 8-)
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Re: APOD: All the Eclipses of 2017 (2017 Dec 07)

Postby De58te » Thu Dec 07, 2017 12:27 pm

BDanielMayfield wrote:Is four the minimum number of eclipses of all types that can occur in one calendar year? I seem to recall that solar eclipses can be bracketed by lunar eclipses both two weeks before and after the solar.

Bruce

That is true. 4 is the minimum number of eclipses in a calendar year. 7 is the maximum. Bear in mind that not all of them would be visible at a given location, particularly with the Solar Eclipses.

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Re: APOD: All the Eclipses of 2017 (2017 Dec 07)

Postby BobStein-VisiBone » Thu Dec 07, 2017 1:00 pm

Indigo_Sunrise wrote:
Calkin wrote:The "Saros Numbers" hyperlink seems incorrect and does not take one to another webpage ?

I was just going to say this. It appears the date is missing a digit.


Code: Select all

https://apod.nasa.gov/apod/ap17811.html
the "Saros numbers" link

Code: Select all

https://apod.nasa.gov/apod/ap170811.html
should be

BDanielMayfield
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Re: APOD: All the Eclipses of 2017 (2017 Dec 07)

Postby BDanielMayfield » Thu Dec 07, 2017 2:15 pm

De58te wrote:
BDanielMayfield wrote:Is four the minimum number of eclipses of all types that can occur in one calendar year? I seem to recall that solar eclipses can be bracketed by lunar eclipses both two weeks before and after the solar.

Bruce

That is true. 4 is the minimum number of eclipses in a calendar year. 7 is the maximum. Bear in mind that not all of them would be visible at a given location, particularly with the Solar Eclipses.


Thanks De58te. So, as years go, we kinda got shorted a few lunar eclipses this year. I wonder why?
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Re: APOD: All the Eclipses of 2017 (2017 Dec 07)

Postby neufer » Thu Dec 07, 2017 7:11 pm

BDanielMayfield wrote:
De58te wrote:
BDanielMayfield wrote:
Is four the minimum number of eclipses of all types that can occur in one calendar year? I seem to recall that solar eclipses can be bracketed by lunar eclipses both two weeks before and after the solar.

That is true. 4 is the minimum number of eclipses in a calendar year. 7 is the maximum. Bear in mind that not all of them would be visible at a given location, particularly with the Solar Eclipses.

Thanks De58te. So, as years go, we kinda got shorted a few lunar eclipses this year. I wonder why?

Patience, Grasshopper.

We kinda got shorted in eclipses this year but we will make up for it in the upcoming years:

    2018 : 3 solar eclipses
    2019 : 3 solar eclipses
    2020 : 4 lunar eclipses
The Moon's orbital plane gradually rotates once every 18.61 years due to the Solar tidal force
such that the solstice nodes point towards the Sun every 9.305 years; hence:

    2028 : 3 lunar eclipses
    2029 : 4 solar eclipses

    2038 : 4 lunar eclipses & 3 solar eclipses

    2047 : 4 solar eclipses
    2048 : 3 lunar eclipses
Art Neuendorffer

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Re: APOD: All the Eclipses of 2017 (2017 Dec 07)

Postby Craig Willford » Thu Dec 07, 2017 9:10 pm

Indigo_Sunrise wrote:
Calkin wrote:The "Saros Numbers" hyperlink seems incorrect and does not take one to another webpage ?

I was just going to say this. It appears the date is missing a digit.

It's very cool that one individual was able to travel to each of those places to capture these images! 8-)

The hyperlink appears to have meant to put "08" instead of just "8" in the date.


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