Earlier quoted context omitted.
Yeah alchemy seem like a completely different field than astronomy today, but at the time it was considered deeply connected - the metals was corresponding to the planets and so on. Because the heavenly order was considered reflected in the earthly materials and vice versa, studying one would lead you to greater understanding of the other. For a modern viewpoint it might seem like Newton was "hedging his bets" by con…
Ptolemy is likewise revered by astronomers as one of their founding fathers but they conveniently ignore the fact that in astrological circles he occupies a similar position due to his seminal work, the Tetrabiblos. Scientists can become very selective when dealing with alternatives to their world view.
No, they just remember people for their contributions rather than their mistakes.