This also is a part of the teaching of the Church, that there are certain angels of God, and certain good influences, which are His servants in accomplishing the salvation of men. When these, however, were created, or of what nature they are, or how they exist, is not clearly stated. Regarding the sun, moon, and stars, whether they are living beings or without life, there is no distinct deliverance.
Origen
On First Principles, Book I
Preface