Pale blue dot: what causes the bands?

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Discussion Overview

The discussion revolves around the "Pale Blue Dot" photograph of Earth taken from outside the solar system, specifically focusing on the colored bands visible in the image. Participants explore whether these bands are optical illusions, their relation to Earth's orbit, and the factors contributing to their coloration.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant questions the cause of the colored bands in the "Pale Blue Dot" image, suggesting they may be an optical illusion or related to Earth's orbital position.
  • Another participant cites a source indicating that Earth is positioned in the center of scattered light rays due to the proximity of the photograph to the sun.
  • A subsequent reply confirms that the bands are artifacts of the photograph and would not be perceived by an observer at Voyager's location.
  • Further clarification is provided that the bands result from glare, implying that they are not a physical phenomenon observable in space.

Areas of Agreement / Disagreement

Participants generally agree that the bands are artifacts of the photograph rather than actual features observable from Voyager's location, but there is no consensus on the broader implications or interpretations of these artifacts.

Contextual Notes

Some assumptions about the visibility of the bands from different perspectives and the nature of glare are present but not fully explored or resolved.

dotancohen
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In the famous photo "Pale Blue Dot" of the Earth from outside the solar system, one can see "bands" of colour around the Earth. What causes these bands? Is that an optical illusion? Does the band in which Earth is found describe the Earth's orbit? What are the other coloured bands? What gives them their colour? Here is the photo for reference:
http://upload.wikimedia.org/wikipedia/commons/7/73/Pale_Blue_Dot.png

Thanks in advance.
 
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From http://visibleearth.nasa.gov/view_rec.php?id=599 : (found in Wikipedia references)
Coincidentally, Earth lies right in the center of one of the scattered light rays resulting from taking the image so close to the sun.
 
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Thanks, Hurkyl! So the band is an artefact of the photograph and would not be seen by an observer at Voyager's location?
 
Thanks, Davidfix. That Messenger site is great!
 
No problem. :) Yeah, that site has some cool stuff... Gives you a good idea of the relative size of the planets, for sure. :)

Damn, the sun is BIG! :D
 

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