Praise ye him, sun and moon - The most conspicuous and glorious objects in the heavens, as apparent to the eyes of people.
Praise him, all ye stars of light - A poetical expression to denote bright or shining stars. The phrase embraces all the stars as they strike the eyes of people. Each one has something special to it for which to praise God: and the entire groups - the immense multitudes, as such - should join in one chorus of praise.