There is key thin layer of iridium that indicate an asteroid hit the earth about 65 million years ago. The moon is receding a few inches each year. Billions of years ago the moon would have been so close that the tides would have been much higher, eroding away the continents. The moon is receding less than two inches a year. There are many variables that are not factored in.
Uranium continues to decay into a stable lead isotope.
The existence of great quantities of space dust, which by the Pointing-Robertson effect would have been vacuumed out of our solar system in a few thousand years, indicates the solar system is young. In a closed system this would be true, but the solar system is not a closed system. Comets bring in new dust. At the rate many star clusters are expanding, they could not have been traveling for billions of years. There is a repeating cycle of stars forming and collapsing.