Some more astronomy modules requested to be installed

[NigelHambly]

User SGoughKelly has requested the following packages be installed (not sure if needed on all workers as well as head node, but as long as there's no penalty in doing so may as well include on all the workers just in case distributed code invokes in UDFs):

• https://dustmaps.readthedocs.io/en/latest/#
• https://github.com/jobovy/mwdust
• https://gitlab.com/icc-ub/public/gaiadr3_zeropoint

[Zarquan]

Notes from duplicate issue #1026:

In follow up emails, SGoughKelly mentions two specific Python packages that would be useful:

• jobovy/mwdust
• gregreen/dustmaps

[NigelHambly]

At the recent Gaia CU9 meeting another useful package has been identified (GaiaUnlimited):

https://github.com/gaia-unlimited/gaiaunlimited

This is available via pip install amongst other methods.