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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!
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
Great American Solar Eclipse August 21 2017
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- 7 Replies
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Last post by Carbon60
Sat Mar 10, 2018 8:31 am
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- 3 Replies
- 1166 Views
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Last post by Carbon60
Fri Feb 02, 2018 8:11 am
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- 10 Replies
- 1914 Views
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Last post by Anthony M
Wed Jan 31, 2018 11:43 pm
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- 22 Replies
- 4454 Views
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Last post by Wah
Wed Dec 06, 2017 8:50 am
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- 3 Replies
- 1350 Views
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Last post by marktownley
Sun Oct 08, 2017 9:26 am
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Lunar Limb profile extraction from Solar Eclipse imagery
by AndrevdHoeven » Mon Sep 25, 2017 8:13 pm - 8 Replies
- 1663 Views
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Last post by Montana
Thu Sep 28, 2017 11:58 am
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- 4 Replies
- 1428 Views
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Last post by Wah
Thu Sep 28, 2017 8:29 am
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Partial Eclipse Solar Party (Outreach & Images) in Florida | HA & WL | Aug 21 2017
by MalVeauX » Tue Aug 22, 2017 1:25 am - 10 Replies
- 1827 Views
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Last post by DanielBrousseau
Sun Sep 24, 2017 8:09 pm
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- 2 Replies
- 949 Views
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Last post by Montana
Sun Sep 24, 2017 4:24 pm
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- 5 Replies
- 1332 Views
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Last post by marktownley
Wed Sep 20, 2017 5:59 am
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- 17 Replies
- 3250 Views
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Last post by rray6
Mon Sep 11, 2017 4:16 pm
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- 3 Replies
- 1087 Views
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Last post by rray6
Mon Sep 11, 2017 4:07 pm
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- 3 Replies
- 1045 Views
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Last post by rsfoto
Mon Sep 11, 2017 2:11 pm
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Solar eclipse (also annotated with scale and star field)
by AndrevdHoeven » Fri Sep 01, 2017 11:15 pm - 5 Replies
- 1380 Views
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Last post by marktownley
Sun Sep 10, 2017 10:29 pm
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- 12 Replies
- 2036 Views
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Last post by marktownley
Sun Sep 10, 2017 10:29 pm
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- 11 Replies
- 2057 Views
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Last post by marktownley
Sun Sep 10, 2017 10:22 pm
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- 13 Replies
- 2382 Views
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Last post by marktownley
Sun Sep 10, 2017 10:15 pm
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- 3 Replies
- 1130 Views
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Last post by marktownley
Sun Sep 10, 2017 10:11 pm
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- 7 Replies
- 1806 Views
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Last post by marktownley
Sun Sep 10, 2017 10:08 pm
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- 8 Replies
- 1700 Views
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Last post by marktownley
Sun Sep 10, 2017 10:06 pm
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- 5 Replies
- 1322 Views
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Last post by marktownley
Sun Sep 10, 2017 9:56 pm
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- 7 Replies
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Last post by marktownley
Sun Sep 10, 2017 9:54 pm
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- 3 Replies
- 1103 Views
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Last post by marktownley
Sun Sep 10, 2017 9:51 pm
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- 9 Replies
- 1639 Views
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Last post by marktownley
Sun Sep 10, 2017 9:45 pm
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- 8 Replies
- 1526 Views
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Last post by marktownley
Sun Sep 10, 2017 9:41 pm
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- 7 Replies
- 1504 Views
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Last post by marktownley
Sun Sep 10, 2017 9:39 pm
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- 3 Replies
- 1177 Views
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Last post by marktownley
Sun Sep 10, 2017 9:32 pm
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- 3 Replies
- 1173 Views
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Last post by marktownley
Sun Sep 10, 2017 9:30 pm
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- 17 Replies
- 2883 Views
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Last post by marktownley
Sun Sep 10, 2017 9:27 pm
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- 13 Replies
- 2192 Views
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Last post by marktownley
Sun Sep 10, 2017 9:17 pm
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Correction Satellite Transit during the Eclipse - 3 Screenshot Images
by Bagpiper2004 » Tue Aug 22, 2017 12:12 pm - 4 Replies
- 1238 Views
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Last post by marktownley
Sun Sep 10, 2017 9:16 pm
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- 1 Replies
- 781 Views
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Last post by Montana
Tue Sep 05, 2017 7:35 am
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- 2 Replies
- 875 Views
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Last post by marktownley
Mon Aug 21, 2017 12:03 am
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- 2 Replies
- 952 Views
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Last post by Merlin66
Sun Aug 20, 2017 11:36 pm
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- 9 Replies
- 1788 Views
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Last post by gabrieli
Sun Aug 20, 2017 11:36 am
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- 4 Replies
- 1141 Views
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Last post by DDolan1075
Sat Aug 19, 2017 8:12 pm
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My kit for the solar eclipse, tested in my back garden
by michael.h.f.wilkinson » Fri Aug 04, 2017 1:50 pm - 4 Replies
- 1195 Views
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Last post by Derek Klepp
Sat Aug 19, 2017 7:42 am
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- 5 Replies
- 1630 Views
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Last post by Anthony M
Fri Aug 18, 2017 5:57 pm
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- 8 Replies
- 1789 Views
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Last post by Anthony M
Fri Aug 18, 2017 8:34 am
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- 11 Replies
- 1881 Views
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Last post by Anthony M
Fri Aug 18, 2017 8:30 am
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- 4 Replies
- 1120 Views
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Last post by marktownley
Mon Aug 14, 2017 7:26 pm
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- 2 Replies
- 932 Views
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Last post by Anthony M
Mon Aug 14, 2017 3:57 am
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Anyone looking for RV/5th Wheel hook-ups in Oregon for eclipse?
by RVEclipser » Mon Aug 07, 2017 8:10 pm - 2 Replies
- 759 Views
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Last post by OTangen
Sat Aug 12, 2017 2:09 pm
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- 2 Replies
- 946 Views
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Last post by Montana
Sat Aug 12, 2017 10:29 am
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- 2 Replies
- 947 Views
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Last post by Montana
Fri Aug 11, 2017 6:53 am
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- 2 Replies
- 984 Views
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Last post by michael.h.f.wilkinson
Wed Aug 09, 2017 11:34 am
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- 4 Replies
- 1622 Views
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Last post by marktownley
Mon Jul 03, 2017 6:52 pm
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- 3 Replies
- 1139 Views
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Last post by thesmiths
Sun Jul 02, 2017 12:37 am
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- 0 Replies
- 1254 Views
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Last post by solarchat
Mon Jun 19, 2017 2:27 pm
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- 1 Replies
- 1050 Views
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Last post by Montana
Mon May 01, 2017 8:23 pm
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- 1 Replies
- 910 Views
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Last post by Montana
Sun Apr 30, 2017 12:28 pm
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- 5 Replies
- 1550 Views
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Last post by Montana
Sun Mar 12, 2017 5:30 pm
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- 12 Replies
- 7459 Views
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Last post by Sunwatcher
Fri Feb 17, 2017 1:47 pm
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- 4 Replies
- 1481 Views
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Last post by Montana
Thu Feb 09, 2017 8:26 am
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- 5 Replies
- 1639 Views
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Last post by MapleRidge
Sun Jan 29, 2017 9:56 pm
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- 4 Replies
- 1434 Views
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Last post by Okay-1
Thu Jan 05, 2017 9:32 am
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- 1 Replies
- 1189 Views
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Last post by marktownley
Sat Sep 10, 2016 12:02 pm
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- 0 Replies
- 1337 Views
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Last post by Sunwatcher
Fri Sep 09, 2016 11:52 am
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- 7 Replies
- 2907 Views
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Last post by Sunwatcher
Sun Sep 04, 2016 12:16 pm
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- 1 Replies
- 1235 Views
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Last post by marktownley
Sun Sep 04, 2016 10:01 am