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Credit & Copyright: Sam Cornwell
Explanation:
The
2019 December Solstice,
on the first day of winter in planet
Earth's northern hemisphere and summer in the south, is at 4:19 Universal
Time December 22.
That's December 21 for North America, though.
Celebrate
with
a timelapse animation of the Sun's seasonal progression through the sky.
It was made with solargraph images from
an ingenious array of 27 pinhole cameras.
The first frame from the
Solarcan
camera matrix was recorded
near December 21, 2018.
The last frame in the series finished
near June 21, 2019, the northern summer solstice.
All 27 camera exposures were started at the same time,
with a camera covered and removed from the array
once a week.
Viewed consecutively the pinhole camera pictures accumulate the
traces of the Sun's daily path from winter (bottom) to summer (top) solstice.
Traces of the Sun's path are reflected by the
foreground Williestruther Loch, in the Scottish Borders.
Just select the image or follow this link to
play
the entire 27 frame (gif) timelapse.
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NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
Based on Astronomy Picture
Of the Day
Publications with keywords: solstice
Publications with words: solstice
See also: