Solstice Sun Rolling Down the Hill
Taken by Helio C. Vital on December 21, 2016 @
Rio de Janeiro, Brazil
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Details:
This 8-frame animation shows the Sun setting 10 hours after the summer solstice in the Southern Hemisphere. Like a ball rolling down the left side of the 1.0-km-high Tijuca Peak at a distance of 6.4 km, there it apparently goes, in spite of actually being 23 million times further. Amazingly the slope of the peak as well as of the celestial great circles roughly coincide, forming an angle of about 23° with the vertical, equal to Rio`s tropical latitude. A photo of the Sun setting over the Tijuca Peak 14 hours before the solstice (Dec.20) follows. Then the area swept out by the setting Sun as it descends almost in parallel with the hillside on Dec. 21 is shown in the third entry. Finally, a second animation shows the Sun hiding behind the Tijuca Mountain Park. A Canon SX60 HS camera with filter for solar observation was used, excepting for the second (white light) image.
Photographer's website:
http://https://www.flickr.com/helio_c_vital
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