Oh wow, I just unlocked Saturn on PS4 and just noticed this for the first time - this is pretty brutal. Veil Proxima as I understand also has the same issue, so we're investigating for a fix. Thanks for reporting guys, for now the workarounds that have been mentioned here will get you into Saturn:
- Use Right stick to manually zoom in
- Hover cursor at the top of the first ring that appears when selecting Saturn/Veil Proxima