Hubble Reveals Latest Portrait of Saturn

Re:Hubble Reveals Latest Portrait of Saturn by metaphor on Sunday September 15, 2019 @06:17PM (#20979784)

From the image titled The Moons of Saturn (annotated)[1], what relevance do the arrows denoting "North" and "East" have?

I'm genuinely dumbfounded by the concept of cardinal directions in space.

[1] https://www.spacetelescope.org/images/heic1917b/

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Re:Hubble Reveals Latest Portrait of Saturn by Cogito on Sunday September 15, 2019 @08:25PM (#20980264)

This is from memory, so apologies if vastly wrong.

North is the direction out of the solar system plane in the same direction as Earth's North. East is prograde; tangent to the radial line from the sun, and in the direction of travel about the sun.

Quickly googling I discovered that Saturn is considered to 'Rule the West' in some astrology circles, but alas I think that may not help this discussion.

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