[The Stars Say:]

You alone are HaShem; You made the heavens,

the most exalted heavens and all their legion,

the earth and all that is upon it,

the seas and all that is in them,

and You give them all life;

and the heavenly legion bows to You.

(Nechemya 9:6)

A proclamation of G-d's infinite greatness, of His total mastery of every element of the universe. Almost every day, powerful telescopes see new suns, some of them bigger than the distance from our tiny planet to our little sun.  They see galaxies that dwarf ours, a constantly expanding universe.  And it all bows to the Master of the Heavenly legions!
[Tanach, Rabbi Scherman, Perek Shira]

[The Moon Says:]

He made the moon for festivals,

the sun knows its setting.

(Tehillim 104:19)

G-d created the moon to be the basis of our calendar, the timeline of the Festivals.  The moon does not have its own light, it shines in conjunction with the sun.  But "the sun knows it setting."  Its rising and setting are fixed because it shines by its own light.  The waning and waxing of the moonlight symbolizes human life.  Until his middle years, a person continues to increase, thereafter he continues to decrease, until he reaches the appointed place of all living things.
[MeAm Lo'ez, Perek Shira]