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Solar Analemma. This outstanding image from Alexandra Hart taken over a period of 4 years charts the midday position of the sun in the sky throughout the year. The north–south component of the analemma results from the change in the Sun's declination due to the tilt of Earth's axis of rotation. The east–west component results from the nonuniform rate of change of the Sun's right ascension, governed by combined effects of Earth's axial tilt and orbital eccentricity.

Merry Christmas, Happy New Year and looking forward to a great solar cycle 25!

Welcome to Solar Chat! The best forum for Solar Astronomy
Moving forward from solar cycle 24 to 25

Search found 441 matches

by banjo
Mon Jan 06, 2020 12:24 pm
Forum: This is SolarChat !!
Topic: AR2755
Replies: 13
Views: 202

Re: AR2755

thank you very much Brian , Mark and Stu
by banjo
Sat Jan 04, 2020 7:04 am
Forum: This is SolarChat !!
Topic: AR2755
Replies: 13
Views: 202

Re: AR2755

thank you very much to all,
Paul
by banjo
Fri Jan 03, 2020 12:25 pm
Forum: This is SolarChat !!
Topic: AR2755
Replies: 13
Views: 202

Re: AR2755

thank you very much to all,
I do not have much experience in wl, the treatment seems to me more difficult when Ha when the sky is not perfect.
Paul
by banjo
Fri Jan 03, 2020 7:54 am
Forum: This is SolarChat !!
Topic: AR2755
Replies: 13
Views: 202

AR2755

Good morning all,
for once small infidelity to Ha, quickly done, transparency still just as bad for me.
a test with the Herschel + continuum filter, I have a big problem on the blade which seems out of band.
Not had time a single take to arrange the whole my racket of development broke down.
Paul
by banjo
Thu Jan 02, 2020 7:31 am
Forum: This is SolarChat !!
Topic: January 1, 2020 FDs + Highlights
Replies: 10
Views: 148

Re: January 1, 2020 FDs + Highlights

Very nice images .
:bow :bow :bow :bow
Paul
by banjo
Thu Jan 02, 2020 7:29 am
Forum: This is SolarChat !!
Topic: Sol and its reflection from the last day of 2019.
Replies: 13
Views: 201

Re: Sol and its reflection from the last day of 2019.

Very nice images . Bravo!
:bow :bow :bow :bow :bow :bow
Paul
by banjo
Thu Jan 02, 2020 7:27 am
Forum: This is SolarChat !!
Topic: Sun January 1, 2020
Replies: 18
Views: 302

Re: Sun January 1, 2020

Very nice images Franco.Bravo!
:bow :bow :bow :bow
Paul
by banjo
Thu Jan 02, 2020 7:23 am
Forum: This is SolarChat !!
Topic: A new AR at the sun face has developed.
Replies: 5
Views: 136

Re: A new AR at the sun face has developed.

Very,very good,bravo!!!!
:bow :bow :bow :bow :bow :bow :bow
Paul
by banjo
Thu Jan 02, 2020 7:21 am
Forum: This is SolarChat !!
Topic: Another 25th cycle spot
Replies: 16
Views: 262

Re: Another 25th cycle spot

:bow :bow :bow
Paul
by banjo
Thu Jan 02, 2020 7:20 am
Forum: This is SolarChat !!
Topic: The Solarscope in winter!!!!!
Replies: 13
Views: 242

Re: The Solarscope in winter!!!!!

Magnifique disque Alexandra , bravo!!!!
:bow :bow :bow :bow :bow :bow :bow :bow :bow
Paul
by banjo
Thu Jan 02, 2020 7:16 am
Forum: This is SolarChat !!
Topic: last animation of the year 2019
Replies: 8
Views: 132

Re: last animation of the year 2019

Thank You Mark
Paul
by banjo
Wed Jan 01, 2020 9:08 am
Forum: This is SolarChat !!
Topic: last animation of the year 2019
Replies: 8
Views: 132

Re: last animation of the year 2019

BAe.gif
BAe.gif (12.81 KiB) Viewed 92 times
thank you very much to all for your very nice messages.

Paul
by banjo
Tue Dec 31, 2019 3:50 pm
Forum: This is SolarChat !!
Topic: last animation of the year 2019
Replies: 8
Views: 132

last animation of the year 2019

Good morning all , not the best of the year the weather conditions not top (fog then clouds) but must mark it and like a ball towards the end of the film a super protu it developed very quickly for 20 minutes and like a C% & I did not press the record button. pleure-triste-59.gif the year Paul ended...
by banjo
Tue Dec 31, 2019 1:57 pm
Forum: This is SolarChat !!
Topic: My new observatory
Replies: 14
Views: 254

Re: My new observatory

fire.jpg
fire.jpg (105.19 KiB) Viewed 224 times
Paul
by banjo
Tue Dec 31, 2019 10:43 am
Forum: This is SolarChat !!
Topic: Misery on observatory
Replies: 5
Views: 112

Misery on observatory

Hello,
look above the Pic du Midi observatory in Bigorre, what misery these planes are.
My West view .
Paul
by banjo
Tue Dec 31, 2019 7:44 am
Forum: This is SolarChat !!
Topic: Full Disc 30 December 2019
Replies: 10
Views: 139

Re: Full Disc 30 December 2019

:bow :bow :bow
Paul
by banjo
Mon Dec 30, 2019 12:21 pm
Forum: This is SolarChat !!
Topic: Sun 27 décembre 19- NEW Proms-NEW animation
Replies: 15
Views: 246

Re: Sun 27 décembre 19- NEW Proms-NEW animation

Thank you Brian.
Paul
by banjo
Sun Dec 29, 2019 9:33 am
Forum: This is SolarChat !!
Topic: Sun 27 décembre 19- NEW Proms-NEW animation
Replies: 15
Views: 246

Re: Sun 27 décembre 19- NEW Proms

goodmorn.gif
goodmorn.gif (7.18 KiB) Viewed 141 times
Thank you all for your messages.
Alexandra jurassic park around the sun, a bestiary to do, I'm going to look at my old images. :D

Paul
by banjo
Sat Dec 28, 2019 1:45 pm
Forum: This is SolarChat !!
Topic: Sun 27 décembre 19- NEW Proms-NEW animation
Replies: 15
Views: 246

Re: Sun 27 décembre 19

thank you Mark,
Paul
soleil-a-27dec19.jpg
soleil-a-27dec19.jpg (442.34 KiB) Viewed 181 times
soleil-b-27dec19.jpg
soleil-b-27dec19.jpg (195.69 KiB) Viewed 181 times
soleil-c-27dec19.jpg
soleil-c-27dec19.jpg (293.95 KiB) Viewed 181 times
by banjo
Sat Dec 28, 2019 6:46 am
Forum: This is SolarChat !!
Topic: Sun 27 décembre 19- NEW Proms-NEW animation
Replies: 15
Views: 246

Re: Sun 27 décembre 19

Hello everyone and thank you for your messages,
too bad these spots disappear quickly, will he wake up son . :D
Paul
by banjo
Fri Dec 27, 2019 5:33 pm
Forum: This is SolarChat !!
Topic: Sun 27 décembre 19- NEW Proms-NEW animation
Replies: 15
Views: 246

Sun 27 décembre 19- NEW Proms-NEW animation

Hello,
In sud of sun .
Animation very long to load 21Mo

Paul
Sun_105741_2712.gif
Sun_105741_2712.gif (21.12 MiB) Viewed 138 times
by banjo
Thu Dec 26, 2019 12:11 pm
Forum: This is SolarChat !!
Topic: A new, belong to Cycle-25, sunspot!
Replies: 12
Views: 281

Re: A new, belong to Cycle-25, sunspot!

Very nice, Valery . :bow :bow :bow :bow :bow :bow :bow
Paul
by banjo
Thu Dec 26, 2019 12:10 pm
Forum: This is SolarChat !!
Topic: Full Disc 24 December 2019
Replies: 16
Views: 216

Re: Full Disc 24 December 2019

:bow
Paul
Very nice,