This effect is due to the attraction of the sun.
J. D. Forbes.
Due, adv. Directly; exactly; as, a due east course.
Due, n. 1. That which is owed; debt; that which one contracts to pay, or do, to or for another; that which belongs or may be claimed as a right; whatever custom, law, or morality requires to be done; a fee; a toll.
He will give the devil his due.
Shak.
Yearly little dues of wheat, and wine, and oil.
Tennyson.