The solar system is a delightful example of the creativity of the Lord. It is beautiful and interesting, and a wonderful example of how the Lord hides fascinating truths in nature for us to discover over time. We know so much about the solar system today, and it is far different and more interesting than our ancestors could have ever imagined.
The gap theory was one of the earlier attempts to reconcile the secular belief in deep time (millions of years) with the biblical timescale of around 6000 years. The gap theory does not stand up to scrutiny and has been thoroughly refuted.