My new profile photo

I just saw this jpg on the BBC 'Periodic Tales' webpage and thought 'oh yes, you shall be mine...' as my profile piccy. Cool graphic.
I wonder what the copyright protections are on a spruced up 300 odd year old graphic? (kinda belittles the unifying concept that dragged my discipline kicking and screaming out of the astrology/alchemy tar-pit into the modern world).