When the morning stars sang together, and all the sons of God shouted for joy?
The morning stars are the infinite suns out in space which are suns to other planets like our sun is to our earth and its related planets.
This passage proves that the whole of the heavens was created before the earth itself or these stars could not have been singing when God laid the foundations of the earth [v 6-7].
That the material creations do sing and speak their own languages is plainly stated in Psalm 19 and many other scriptures. In fact, all creations have some means of communication with one another and with God and man.
This will be more in evidence after the curse is removed from all creation [Rom. 8: 21-24; Rev. 22:3]
[…all the sons of God]: These were angels [v7; 1:6; 2:1; Gen. 6:1-4, notes]
– Dake Annotated Reference Bible: page 544
PSALM 19: 1-6
The heavens declare the glory of God; and the firmament sheweth his handy-work.
Day unto day uttereth speech, and night unto night sheweth knowledge.
There is no speech nor language, where their voice is not heard.
Their line is gone out through all the earth, and their words to the end of the world. In them hath he set a tabernacle for the sun,
Which is as a bridegroom coming out of his chamber and rejoiceth as a strong man to run a race.
His going forth if from the end of the heaven, and his circuit unto the ends of it; and there is nothing hid from the heat thereof.
The sound of the voices of the heavens, the firmament, days, and nights speak and make their knowledge known wherever men are found [v3]. Their messages of a Supreme God are manifest to all.
The heavens, God has set a tabernacle for the sun in the heavens and His hand-work of creation [v 4]
The sun has two movements of its own. It rotates on its axis just as the earth does every 25 days. It moves in a circuit through space among the stars at 12 miles a second, or 43,200 miles an hour.
Hebrew, ‘chuppah’, bridal canopy erected on 4 poles which 4 Jews held over the head of the bridegroom [v 5].
In reality the earth and the sun, as well as all heavenly bodies travel eternally in their own circuits and orbits through space in conjunction with one another. The sun moves through space in its own circuit at the rate of 43,200 miles an hour. Its own planets revolve around it as they all travel through. How long it takes to make a complete circuit through the entire heavens is not known [v 6].
The surface temperature of the sun is about 12,000 degrees Fahrenheit and the center about 40,000,000 degrees F. No life could exist on the sun.
– Dake A.R. Bible: page 556