Old Black and White with Giant Brain Creature and Aatronauts

I remember seeing a film when I was young (in the 70’s).  It was black and white.  All I really remember about it is that some astronauts encounter some kind of brain creature.  There is some conversation (it speaks telepathically), and it ends up eating one of them.  I have been searching for a while to find out what movie it is, without any luck.

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