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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 1045 matches

by solardave
Sat May 02, 2015 6:08 pm
Forum: This is SolarChat !!
Topic: todays three lights 2-5-15
Replies: 10
Views: 1034

todays three lights 2-5-15

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by solardave
Sat Apr 25, 2015 11:37 am
Forum: This is SolarChat !!
Topic: halpha the gong big bear look weather awful 25-4-15
Replies: 4
Views: 429

halpha the gong big bear look weather awful 25-4-15

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by solardave
Mon Apr 20, 2015 3:01 pm
Forum: This is SolarChat !!
Topic: Sunday Full Disk
Replies: 8
Views: 368

Re: Sunday Full Disk

nice images good job :bow
by solardave
Mon Apr 20, 2015 2:38 pm
Forum: This is SolarChat !!
Topic: side by side three lights from 19-4-15
Replies: 8
Views: 427

Re: side by side three lights from 19-4-15

thanks michael :)
by solardave
Mon Apr 20, 2015 2:35 pm
Forum: This is SolarChat !!
Topic: three lights 19-4-15
Replies: 6
Views: 531

Re: three lights 19-4-15

thanks walter and mark :) :)
by solardave
Mon Apr 20, 2015 2:29 pm
Forum: This is SolarChat !!
Topic: side by side three lights from 19-4-15
Replies: 8
Views: 427

Re: side by side three lights from 19-4-15

thanks walter
by solardave
Sun Apr 19, 2015 7:52 pm
Forum: This is SolarChat !!
Topic: Sun in Ha 18th April 2015
Replies: 9
Views: 458

Re: Sun in Ha 18th April 2015

nice images :bow
by solardave
Sun Apr 19, 2015 7:35 pm
Forum: This is SolarChat !!
Topic: three lights 19-4-15
Replies: 6
Views: 531

Re: three lights 19-4-15

can anyone explain to me how to put my three lights in a row together as one image step by step photoshop cs6 exstended thanks david
by solardave
Sun Apr 19, 2015 7:21 pm
Forum: This is SolarChat !!
Topic: sUN 18 4 2015
Replies: 4
Views: 265

Re: sUN 18 4 2015

nice good job :bow
by solardave
Sun Apr 19, 2015 7:13 pm
Forum: This is SolarChat !!
Topic: AR 2321 in Pyrenees mountains
Replies: 10
Views: 604

Re: AR 2321 in Pyrenees mountains

fantastic images :bow :bow
by solardave
Sun Apr 19, 2015 7:08 pm
Forum: This is SolarChat !!
Topic: three lights 19-4-15
Replies: 6
Views: 531

Re: three lights 19-4-15

thanks Alexandra :)
by solardave
Sun Apr 19, 2015 7:04 pm
Forum: This is SolarChat !!
Topic: Saturday Sunshine 18th April
Replies: 10
Views: 491

Re: Saturday Sunshine 18th April

nice images mark :bow
by solardave
Sun Apr 19, 2015 6:57 pm
Forum: This is SolarChat !!
Topic: Woohoo!!!!
Replies: 30
Views: 2122

Re: Woohoo!!!!

nice images Alexandra good job :bow :bow
by solardave
Sun Apr 19, 2015 5:45 pm
Forum: This is SolarChat !!
Topic: three lights 19-4-15
Replies: 6
Views: 531

three lights 19-4-15

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by solardave
Sat Apr 18, 2015 3:43 pm
Forum: This is SolarChat !!
Topic: three lights from tonight 17-4-15
Replies: 8
Views: 406

Re: three lights from tonight 17-4-15

Thanks folks :) :) :) :)
by solardave
Fri Apr 17, 2015 7:37 pm
Forum: This is SolarChat !!
Topic: 15-04-2015 Quark Chromosphere
Replies: 14
Views: 892

Re: 15-04-2015 Quark Chromosphere

nice good job :movie
by solardave
Fri Apr 17, 2015 7:31 pm
Forum: This is SolarChat !!
Topic: 16 Apr 15 Sun from Singapore
Replies: 10
Views: 657

Re: 16 Apr 15 Sun from Singapore

good job :movie
by solardave
Fri Apr 17, 2015 7:29 pm
Forum: This is SolarChat !!
Topic: A quick play with the travelling kit
Replies: 14
Views: 551

Re: A quick play with the travelling kit

nice images mike :bow
by solardave
Fri Apr 17, 2015 7:22 pm
Forum: This is SolarChat !!
Topic: three lights from tonight 17-4-15
Replies: 8
Views: 406

three lights from tonight 17-4-15

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by solardave
Mon Apr 06, 2015 8:43 pm
Forum: This is SolarChat !!
Topic: The Sun 6 April 2015 white light
Replies: 5
Views: 706

Re: The Sun 6 April 2015 white light

good job :bow