Planetary bits

Just a few minor additions plus a few typos etc.

Please could you revert the changes to the contact list; feel free to add yourself to the list but keep the ordering as-is. Add yourself above me. Once that's done I'm happy to merge.

added 1 commit

• df3b2935 - Put the authors back where I was told to

Compare with previous version

Sigh, you try and be helpful and alphabetise...

Thanks Jacob :)

merged

mentioned in commit 9f870f96