Each of the following evidences of a young earth is described in great detail in the books referenced below. The sun is losing both mass and diameter. Changing the mass would upset the fine gravitational balance that keeps the earth at just the right distance for life to survive. I get a picture therefore, of the first spaceship, picking out a nice, level place for landing purposes, coming in slowly downward tail-first, and sinking majestically out of sight. The existence of short-period comets indicates the universe is less than billions of years old.
Fossil meteorites are very rare in layers other than the top layers of the earth.
This indicates that the layers were not exposed for millions of years as is currently being taught in school textbooks. 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 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. At the rate many star clusters are expanding, they could not have been traveling for billions of years.