De Die Martis, & Die Veneris

Saturn and Sol, and Luna chast,
'Twixt Mars and Venus still are plac't,
Whilst Mercury and Iove divide,
The Lovers on the other side.
What may the hidden Mystery
Of this unriddled Order be?
The Gods themselves do justly fear,
That should they trust these two too near;
Mars would be drown'd in Venus, and so they
Should lose a Planet, and the Week a Day.