Thread: Polar Sunrise
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Old September 9th 16, 07:48 PM posted to sci.astro.amateur
Mike Collins[_4_]
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Default Polar Sunrise

Gerald Kelleher wrote:
The sky gets very busy around the area where the Sun comes into view at
dawn, the difference being that the unique polar dawn at the South pole
lasts for a considerable period of weeks when the Sun eventually shows
itself on September 22nd as the Earth has a unique surface rotation as a
function of its orbital motion -

http://www.usap.gov/videoclipsandmaps/spwebcam.cfm

An atmosphere that lacked color for so long, even when the moon passed
before it on the June Solstice now takes on that amazing glow for those
who admire the event daily at sunrise and sunset.

When people get jaded of opinions designed to diminish individuals or
humanity itself they can turn to that intimacy which is their
astronomical inheritance - something to love in a world when men no
longer feel what is important. Again,a unique dawn that happens once a
year at that location.



It shows at about 8 pm UT on the 21st and takes until about 8 am on the
23rd to clear the horizon. During this period it moves 1 and a half times
around the horizon. Can you explain why?