The Hubble Telescope Images a Magnificent Galaxy With “Flocculent” Spiral Arms

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Discussion Overview

The discussion centers around the Hubble Space Telescope's imaging of a galaxy described as having "flocculent" spiral arms. Participants explore the definition of the term, the visual characteristics of the galaxy, and inquire about its rotational direction based on the observed features.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant provides definitions of "flocculent," relating it to its texture and appearance.
  • Another participant expresses appreciation for the Hubble image and shares a mnemonic for remembering the term "flocculent."
  • A question is raised regarding the rotational direction of the galaxy, with a participant noting their expectation for astronomical structures to rotate counter-clockwise when viewed from above the plane of the elliptic.
  • A link to density wave theory is shared, suggesting a connection to the understanding of spiral structures in galaxies.
  • A later reply proposes that the galaxy rotates clockwise based on its visual representation in the image.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the rotational direction of the galaxy, with differing interpretations of the visual evidence presented in the Hubble image.

Contextual Notes

The discussion includes assumptions about the perspective from which the galaxy is viewed and the implications of spiral arm positions on determining rotation, which remain unresolved.

Spinnor
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Had to Google Flocculent,

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adjective

  1. having or resembling tufts of wool.
    "the first snows of winter lay thick and flocculent"
    • having a loosely clumped texture.
      "a brown flocculent precipitate"

https://scitechdaily.com/birds-of-a...gnificent-galaxy-with-flocculent-spiral-arms/
 
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Nice! Great image from HST!
 
I knew the term flocculent; I even know a mnemonic to help remember the definition.
sheep cluster in flocks → wool comes from sheep ⇒ flocculent refers to wooly.

Generally, I expect astronomical structures like the solar system and our galaxy to rotate counter-clockwise (CCW) as pictured from 'above' the plane of the elliptic. Looking at the beautiful HST picture, I cannot determine which direction this galaxy rotates.

Do we know which direction this galaxy rotates based, perhaps, on the positions of the spiral arms? Thanks and pardon if off topic.
 
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