Explanation: Today, the solstice is at 15:54 Universal Time, the Sun reaching the northernmost declination in its yearly journey through planet Earth's sky. A June solstice marks the astronomical beginning of summer in the northern hemisphere and winter in the south. It also brings the north's longest day, the longest period between sunrise and sunset. In fact the June solstice sun is near the top, at the most northern point in the analemma or figure 8 curve traced by the position of the Sun in this composite photo. The analemma was created (video) from images taken every 10 days at the same time from June 21, 2018 and June 7, 2019. The time was chosen to be the year's earliest sunset near the December solstice, so the analemma's lowest point just kisses the unobstructed sea horizon at the left. Sunsets arranged along the horizon toward the right (north) are centered on the sunset at the September equinox and end with sunset at the June solstice.
This is the first time to my knowledge that a person has the APOD and the EPOD simultaneously, with almost the same picture. See today’s EPOD (Earth Science Picture of the Day) at...
Joe Stieber wrote: ↑Fri Jun 21, 2019 8:55 am
This is the first time to my knowledge that a person has the APOD
and the EPOD simultaneously, with almost the same picture.
Marcella Giulia made them an offer they couldn't refuse.
Last edited by neufer on Fri Jun 21, 2019 10:23 am, edited 1 time in total.
ANALEMMA AND AMPLITUDE OCCASIVE FROM SICILY - 2016/2019
Video: Marcella Giulia Pace (www.greenflash.photo)
Music: "3 of 3" by Paolo Battaglia
Know the quiet place within your heart and touch the rainbow of possibility; be
alive to the gentle breeze of communication, and please stop being such a jerk. — Garrison Keillor
Joe Stieber wrote: ↑Fri Jun 21, 2019 8:55 am
This is the first time to my knowledge that a person has the APOD and the EPOD simultaneously, with almost the same picture. See today’s EPOD (Earth Science Picture of the Day) at...
I assume those are white dots added to where the sun was determined to be at that time and not an image of the sun itself, which would require perfect weather conditions every time a picture was taken.
Impressive and informative nonetheless, whatever the technique used to create this image.
JimThomas wrote: ↑Fri Jun 21, 2019 1:35 pm
I assume those are white dots added to where the sun was determined to be at that time and not an image of the sun itself, which would require perfect weather conditions every time a picture was taken.
Impressive and informative nonetheless, whatever the technique used to create this image.
I would assume that each dot is an actual image of the Sun. Certainly, from that location, I'd expect little problem in acquiring that many images with clear skies.
Chris
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Chris L Peterson
Cloudbait Observatory https://www.cloudbait.com
I love this APOD! Once tried to create something similar but never got around to figuring out how to process a year's worth of photos. Congratulations Marcella!
"No avian society ever develops space travel because it's impossible to focus on calculus when you could be outside flying." -Randall Munroe
I do have to say I found this one confusing and hard to follow. The sun seems to be doing the usual analemma thing.... then abruptly takes a right-angle turn in the sky.
This is not a composite of the analemma; it is the analemma composite overlaid with a bunch of mostly-unlabelled sunset positions, AND a sunset sequence every five minutes on June 21, and ANOTHER sunset sequence every five minutes on Sept. 23-- four different composites on the same image (which explains the right-angle turn: it's a different composite.)
