Are One Thing Ultimate Nullifier And Galactus?

A friend of mine says that they are one, because he shows me the scan of the saga of Abraxas, where he says it belongs to me as the heart

but sorry do you not think it's a clear metaphor?

In fact, in the comic, Abraxas kills Galactus, later, however, the Nullifier continues to exist, in fact, Uatu recommended to retrieve the Nullifier, and this works perfectly despite Galactus died

ergo this shows that they are not the same thing

In fact, this idea that it is his weapon, is part of the story much better, how else do you explain the first invasion of Galactus? If it was part of him, as could Reed threaten him ? In a comic, one says that it was a weapon that he had found time ago