John Calvin expressed on more than one occasion his appreciation for the glory of the heavens and the science of astronomy. Following are some select examples of his remarks on the celestial heavens.
For astronomy is not only pleasant, but also very useful to be known: it cannot be denied that this art unfolds the admirable wisdom of God.
Commentary on Ps. 19.1:
When we behold the heavens, we cannot but be elevated, by the contemplation of them, to Him to who is their great Creator; and the beautiful arrangement and wonderful variety which distinguish the courses and station of the heavenly bodies, together with the beauty and splendour which are manifest in them, cannot but furnish us with an evident proof of his providence.
Sermons on Job 9:
Job's intent here is to teach us to be astronomers.
Commentary on Isa. 40.26:
Men see every day the heavens and the stars; but who is there that thinks about their Author? By nature men are formed in such a manner as to make it evident that they were born to contemplate the heavens, and thus to learn their Author; for while God formed other animals to look downwards for pasture, he made man alone erect, and bade him look at what may be regarded as his own habitation.
This is also beautifully described by a poet [Ovid, Metamorphoses 1.85]. "While other animals look downwards towards the earth, he gave to man a lofty face, and bade him look at heaven, and lift up his countenance erect towards the stars." The Prophet [Isaiah] therefore points out the wickedness of men who do not acknowledge what is openly placed before their eyes concerning God, but, like cattle, fix their snout in the earth; for, whenever we raise our eyes upwards, with any degree of attention, it is impossible for our senses not to be struck with the majesty of God.
Commentary on Jeremiah 10.1:
There is no doubt but that the Egyptians and the Chaldeans were true [astronomers], and understood the art, which in itself is praiseworthy; for to observe the stars, what else is it, but to contemplate that wonderful workmanship, in which the power, as well as the wisdom and goodness of God, shines forth? And, indeed, [astronomy] may justly be called the alphabet of theology; for no one can with a right mind come to the contemplation of the celestial framework, without being enraptured with admiration at the display of God's wisdom, as well as of his power and goodness.
In attestation of his wondrous wisdom, both the heavens and the earth present us with innumerable proofs not only those more recondite proofs which astronomy, medicine, and all the natural sciences, are designed to illustrate, but proofs which force themselves on the notice of the most illiterate peasant, who cannot open his eyes without beholding them. It is true, indeed, that those who are more or less intimately acquainted with those liberal studies are thereby assisted and enabled to obtain a deeper insight into the secret workings of divine wisdom. No man, however, though he be ignorant of these, is incapacitated for discerning such proofs of creative wisdom as may well cause him to break forth in admiration of the Creator. To investigate the motions of the heavenly bodies, to determine their positions, measure their distances, and ascertain their properties, demands skill, and a more careful examination; and where these are so employed, as the Providence of God is thereby more fully unfolded, so it is reasonable to suppose that the mind takes a loftier flight, and obtains brighter views of his glory.