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Astronomy Picture of the Day - Unwinding M51
NASA ^ | 6 Apr, 2024 | Image Credit & Copyright: Data - Hubble Heritage Project, Unwinding - Paul Howell

Posted on 04/06/2024 5:04:59 PM PDT by MtnClimber

Explanation: The arms of a grand design spiral galaxy 60,000 light-years across are unwound in this digital transformation of the magnificent 2005 Hubble Space Telescope portrait of M51. In fact, M51 is one of the original spiral nebulae, its winding arms described by a mathematical curve known as a logarithmic spiral, a spiral whose separation grows in a geometric way with increasing distance from the center. Applying logarithms to shift the pixel coordinates in the Hubble image relative to the center of M51 maps the galaxy's spiral arms into diagonal straight lines. The transformed image dramatically shows the arms themselves are traced by star formation, lined with pinkish starforming regions and young blue star clusters. Companion galaxy NGC 5195 (top) seems to alter the track of the arm in front of it though, and itself remains relatively unaffected by this unwinding of M51. Also known as the spira mirabilis, logarthimic spirals can be found in nature on all scales. For example, logarithmic spirals can also describe hurricanes, the tracks of subatomic particles in a bubble chamber and, of course, cauliflower.


TOPICS: Astronomy; Astronomy Picture of the Day; Science
KEYWORDS: apod; nasa
To be added or removed from the Astronomy Picture of the Day ping list please send me a request via "Private Reply" (Mail).

For more detail go to the link and click on the image for a high definition image. You can then move the magnifying glass cursor then click to zoom in and click again to zoom out. When zoomed in you can scan by moving the side bars on the bottom and right side of the image.

1 posted on 04/06/2024 5:04:59 PM PDT by MtnClimber
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To: MtnClimber

2 posted on 04/06/2024 5:05:20 PM PDT by MtnClimber (For photos of scenery and wildlife, click on my screen name for my FR home page. More photos added.)
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To: 21stCenturion; 21twelve; 4everontheRight; abb; AFB-XYZ; AFPhys; Agatsu77; America_Right; ...
Pinging the APOD list

🪐 🌟 🌌 🍔


3 posted on 04/06/2024 5:06:01 PM PDT by MtnClimber (For photos of scenery and wildlife, click on my screen name for my FR home page. More photos added.)
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To: MtnClimber

That doubling effect only occurs when you click on the image to get the high res version. Error perhaps?


4 posted on 04/06/2024 5:27:45 PM PDT by Telepathic Intruder
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To: Telepathic Intruder

That is what it seem like. Could it be twice as good?


5 posted on 04/06/2024 5:52:46 PM PDT by MtnClimber (For photos of scenery and wildlife, click on my screen name for my FR home page. More photos added.)
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To: MtnClimber

Looks like my countertop.


6 posted on 04/06/2024 5:57:47 PM PDT by Deaf and Discerning
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To: MtnClimber
M.C., Thanks! Strawberry stars in floating in a bed of caramel strewn meringue! (There are a few blueberry stars in there too!)

(I will need to take a trip to the local Custard Place now!)

7 posted on 04/06/2024 6:36:31 PM PDT by Pete from Shawnee Mission
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To: MtnClimber

Wow.


8 posted on 04/06/2024 6:50:57 PM PDT by No name given (Anonymous is who you’ll know me as)
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To: MtnClimber

Beautiful.


9 posted on 04/06/2024 7:08:35 PM PDT by boycott
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To: MtnClimber

I’m sure that NASA will have some great shots of the eclipse. I saw last night that the only spots that’s guaranteed to have clear skies during totality are in northern Vermont and Maine and in southern Quebec. I hope they have crews up there.


10 posted on 04/07/2024 4:40:01 AM PDT by Gay State Conservative (Proudly Clinging To My Guns And My Religion)
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To: MtnClimber

The Lord paints with a mighty brush.


11 posted on 04/07/2024 4:44:30 AM PDT by ops33 (SMSgt, USAF, Retired)
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