HiPS package logo and / or banner

[cdeil]

I'd like to make a logo (small, roughly rectangular) and / or banner (larger, with some text) for the HiPS package (for the docs page and future presentations / posters).

Some variants of an idea I had, i.e. a banner showing that HiPS (sphere taken from the HiPS paper) is going to Python and / or sky image pixels.

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I'm not very happy with it, mainly because it doesn't work as a logo.
For that we could try to combine the sphere somehow with the Python or Astropy logo, but just pasting o top of each other doesn't work well:

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So @tboch and @adl1995 -- thoughts? other ideas?

(We don't need this for v0.1, we can take our time and add this for v1.0 at the end of GSoC in September.)

[cdeil]

(some of the images were missing left to right arrows from copy & pasting apparently. But you get the idea)

[tboch]

What is we managed to draw the astropy logo on the sphere ? That might work, I'm gonna try something this week-end

[tboch]

This is what I had in mind: