Psalm 148 is a psalm very close to Psalm 150 that tells us clearly about praising God with all that we are and what we have. It also refers to everything that was created by God to praise Him, because He is their Creator and if they have life it is because He allowed it, so let us praise His holy name all His creation.
Let us see the first verses of the Psalm 148:
1 Praise ye the Lord. Praise ye the Lord from the heavens: praise him in the heights.
2 Praise ye him, all his angels: praise ye him, all his hosts.
3 Praise ye him, sun and moon: praise him, all ye stars of light.
4 Praise him, ye heavens of heavens, and ye waters that be above the heavens.
We can see the might and majesty of God over everything created, we can see how the writer of this psalm mentions all these things, not only commanded to praise the inhabitants of the earth, but also encourages the stars and the Angels praise God.
This is how it should be because everything this writer is mentioning was created by our God and that is why we should give praise before Him. God is powerful and deserves all the exaltation of all His creation, that the moon give praise with its splendor, and may the waters that are above the heavens descend in praise to God, that all in one move may worship God.
Here we can see that it is an order, this is for everyone to worship and sing to God, let us not believe that we are alone, there was and there is a Creator to whom we should give praise forever. Amen.