Visualization tutorial

[ceb8]

…s/setup-python-4.6.0

Bump actions/setup-python from 4.5.0 to 4.6.0

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This tutorial uses Gaia data to demonstrate the use of SkyCoords and their method apply_space_motion to evolve stellar position through time when the proper motion and radial velocity values are known.

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[pllim]

Why is the commit so weird?

[ceb8]

Why is the commit so weird?

I think becuase I ran the tutorial notebook checker on it to strip out the notebook output cells (it seems to make changes even if I've already saved it in an un-run state).

[pllim]

@ceb8 , would you mind amending the commit message so future git blame would be less confusing? Thanks! 🙏

[ceb8]

@pllim Given how long this notebook has sat here with no interaction I am hesitent to do anything to it unless I feel there is a reasonable chance it will actually get into the repo, but I'll keep it in mind for a pre-merge issue.