Well, iron-nickle-ly.
Thanks everybody for your patience in explaining the answers. I think I got it now.
I am fascinated buy space and marvel at the wonder on it all. I think it’s truly amazing that a probe sent from earth years ago can meet up with what is virtually a speck of dust in the universe and then orbit it and send back high quality pictures.
AND THEN the probe is going on to check out another speck of dust somewhere else.
I wish I was young enough and smart enough to be part of it.