There exists an explanation of Mother Mary's Divine License to command the Sun as it left its normal operations on October 13, 1917's Miracle of Fatima.


The Mystical City of God (1670)
Ven. Mary of Jesus of Agreda
Volume II
The Incarnation

41. Then the Lord manifested to her on the same occasion the works of creation performed on the fourth day
(Gen1:14-17). The heavenly Princess Mary learned how and when the luminaries of heaven were formed in the firmament for dividing night and day and for indicating the seasons, days and years; how for this purpose was created the great light of heaven, the sun, presiding as the lord of the day and joined with it the moon, the lesser light, which reigns over the darkness of the night.

In like manner, were formed the stars of the eight heaven so they would gladden the night with their brilliance and preside with their various influences over both the day and the night.  She understood the material substance of what of these luminous orbs was, their form, their size, their properties, their various movements and the uniformity as well as the inequality of the planets.  She knew the number of stars and all their influences exerted upon the earth, both in regard to living and lifeless creatures and the effects and changes which they cause in them by these influences.

42. This is not in conflict with what the Prophet says, that God knows the number of stars and has called them by their names. (Ps. 146:4), for David does not deny to His Majesty the liberty of to conceding to a creature that as a privilege which He possesses by nature. It is plain that since this knowledge is communicable, and would redound to the greater excellence of Mary our Lady, it would not be denied to Her.  Has He not conferred upon her greater favors and has He not made Her the Queen of the stars and of all other creatures? And this knowledge was as it were only a consequence of her dominion and sovereignty over the powers, influences and movements of all the celestial orbs since they were commanded to obey Her as their Queen and Lady. 

43.  In consequence to this command which the Lord gave to the celestial orbs and in accordance to with the dominion which the most holy Mary obtained over them, She possessed such power that if She commanded that the stars leave their positions in heaven they would obey Her instantly and would hasten to the regions She chose to designate.

The same is true of the sun and the planets , for all would pause in their course and suspend their operations to execute the command of Mary. I have already said above (21) that sometimes Her Highness made use of this sovereignty, for as we shall see farther on it happened a few times in Egypt where the rays of the sun are exceedingly strong that She commanded the sun to moderate its heat and not to molest or fatigue the infant God, its Master; and the sun obeyed Her causing inconvenience and suffering to Her because She desired it and yet respecting the tender years of the Sun of Justice whom She held in her arms. The same happened also with other stars, and once She detained the sun in its course, as I shall mention later on.  * (Transfiguration 678)




          Venerable Maria de Agreda (1602 - 1665)

Our Lady's Miracle of the Sun opens up a lot of issues, which may be considered a bit of a digression ... related to cosmology ... that I can bring up on a separate thread so as not to derail this one.

Now if the Lord stopped the sun from turning around the Earth at the request of Joshua, then surely Our Lady could get the Lord to move the sun as happened in Fatima. But, again, as only in the power of God, could this be done for the people of Fatima, whereas for the rest of the world the sun must have remained where it was at the time or all on Earth would have seen it move. Mary of Agreda says above Mary has the power to move cosmic bodies. Maybe so, but only by way of the power of God.