14 Then 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; 15 and let them be for lights in the expanse of the heavens to give light on the earth”; and it was so. 16 God made the two great lights, the greater light to govern the day, and the lesser light to govern the night; He made the stars also. 17 God placed them in the expanse of the heavens to give light on the earth, 18 and to govern the day and the night, and to separate the light from the darkness; and God saw that it was good. 19 There was evening and there was morning, a fourth day.
Here is a video I found on youTube talking about the universe, the sizes of the different celestial bodies, etc. It's 6 1/2 minutes long, kind of slow, but very interesting, and from a Christian perspective. I hope you enjoy it.
Tomorrow's scripture focus: Genesis 1:20-23