Putting this quote from Dennis Venema here just so I don’t lose track of it.
One issue of potential concern during Calvin’s time was the growing understanding of the relative sizes of the various heavenly bodies. For example, astronomers had determined that Saturn was in fact much larger than our own moon. While this comes as no surprise to us now, nor of any theological importance, at that time this discovery was seen by some in the church to contradict the Genesis proclamation that the sun and moon were the “greater” and “lesser” lights created by God. If indeed Saturn was larger than the moon, would not it be named as the “lesser” light instead? While it might be tempting in the present to dismiss this discussion as trivial, we must remember that for its day, this was a significant concern for some. Which was correct? Science, or Scripture?
via Driscoll, Darwin and Doctrine, Part 1: Science or sola Scriptura? | The BioLogos Forum.