Galileo
The following quotes are from Galileo Galilei (1564 - 1642). He was an Italian physicist and astronomer.
Can you decode them?
Both puzzles use the same code.
* The hint provides three vowels.
A=D
"PJQ LXUUJN NCXLV X RXU XUPNVZUK; PJQ LXU JUOP VCOH VZR AZBLJTCD ZN ZU VZRBCOG."
"XOO NDQNVB XDC CXBP NJ QUACDBNXUA JULC NVCP XDC AZBLJTCDCA; NVC HJZUN ZB NJ AZBLJTCD NVCR."