Answer:
A leathery snake, with a stinging bite. I'll stay coiled up, unless I must fight.
I move without wings, Between silken string, I leave as you find, My substance behind.
What travels from house to house and is sometimes narrow and sometimes wide but always stays outside?
I'm a god. I'm a planet. I measure heat.
What is put on a table, cut, but never eaten?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.