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APOD: All the Eclipses of 2017 (2017 Dec 07)
Posted: Thu Dec 07, 2017 5:08 am
by APOD Robot
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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Re: APOD: All the Eclipses of 2017 (2017 Dec 07)
Posted: Thu Dec 07, 2017 6:41 am
by BDanielMayfield
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
Re: APOD: All the Eclipses of 2017 (2017 Dec 07)
Posted: Thu Dec 07, 2017 9:05 am
by Boomer12k
Interesting to see the different types all at one time...
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Re: APOD: All the Eclipses of 2017 (2017 Dec 07)
Posted: Thu Dec 07, 2017 9:05 am
by Calkin
The "Saros Numbers" hyperlink seems incorrect and does not take one to another webpage ?
Re: APOD: All the Eclipses of 2017 (2017 Dec 07)
Posted: Thu Dec 07, 2017 12:20 pm
by Indigo_Sunrise
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!
Re: APOD: All the Eclipses of 2017 (2017 Dec 07)
Posted: Thu Dec 07, 2017 12:27 pm
by De58te
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.
Re: APOD: All the Eclipses of 2017 (2017 Dec 07)
Posted: Thu Dec 07, 2017 1:00 pm
by BobStein-VisiBone
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
Re: APOD: All the Eclipses of 2017 (2017 Dec 07)
Posted: Thu Dec 07, 2017 2:15 pm
by BDanielMayfield
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?
Re: APOD: All the Eclipses of 2017 (2017 Dec 07)
Posted: Thu Dec 07, 2017 7:11 pm
by neufer
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
Re: APOD: All the Eclipses of 2017 (2017 Dec 07)
Posted: Thu Dec 07, 2017 9:10 pm
by Craig Willford
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!
The hyperlink appears to have meant to put "08" instead of just "8" in the date.