And God said, “Let there be lights in the expanse of the heavens to separate the day from the night. And let them be for signs and for seasons, and for days and years, and let them be lights in the expanse of the heavens to give light upon the earth.” And it was so.
I am sure that throughout history, most of the readers had no idea what was really created in this phrase. I believe that it wasn't until the invention of the telescope that people really started to understand. The sad part is that this element of creation, like all elements, is to bring glory to the creator, not to glory in the creation alone. Yet that is exactly what we do!
Give God glory today at what He has made!
I would like to point out that God also created these objects, not just to give light, but to be used to determine seasons and times and year, etc. Still today, even though we have all of this amazing technology, we still use the stars and the sun and the moon to determine our days, nights weeks, months, years, etc.