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[NASA] APOD: 2026 September 8 – Hubble: Decagon Around Saturn’s South Pole

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APOD
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  3. APOD: 2026 September 8 –…
 

APOD

Astronomy Picture of the Day

Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.

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Hubble: Decagon Around Saturn’s South Pole

Explanation: Why are Saturn’s poles geometric? 

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’s North Pole has been known to be surrounded by a 
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 (6 sides) cloud since 
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 in data taken by NASA’s 
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, which quickly flew past the 
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 in the early 1980s. Now, recent observations of Saturn by the 
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 reveal a slightly different geometric cloud pattern around the South Pole: a 
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 (10 
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). The geometric boundaries are 
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 by waves when the fast-moving gas away from the poles interacts with slower-moving gas closer to the poles. In the 
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 by the Hubble taken last year, the 
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 is marked by an X and surrounded by bands of circulating clouds. The 
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 appears most prominent in the dark inner regions. The 
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 has proven stable for over 40 years, while the stability of the southern decagon will surely remain a 
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.

APOD’s main NASA site is 

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: From 
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 to 
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Tomorrow’s picture: open space

Date September 8, 2026
Credit
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, 
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, 
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, 
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; 
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 (
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), A. Simon (NASA-GSFC), M. Wong (UC Berkeley); Processing: 
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 (
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)
Authors & editors: Robert Nemiroff, Jerry Bonnell, Cecilia Chirenti, Keighley Rockcliffe
A service of:
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at
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/
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,
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&
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