
It's always 'dwarfs' in astronomical contexts, I believe.
( ,
Wed 6 May 2009, 0:58,
archived)

I remember an author's note in The Hobbit regarding the use of dwarfish vs dwarvish, but I can't remember what was what.
When I typed this, FF spellcheck approved dwarfish but not dwarvish (or spellcheck. Cuh).
( ,
Wed 6 May 2009, 0:59,
archived)
When I typed this, FF spellcheck approved dwarfish but not dwarvish (or spellcheck. Cuh).