Well, if you make a limestone tower and a acid rain falls onto it, the tower will dissolve and then you won't have a tower
1. <span>the process started with the collapse of a nebula
The universe almost certainly didn't start from the collapse of a nebula.
2. The mantle is the middle layer.</span>
The answer is mineral deposits
It keeps us from flying into outerspace.
Astronomical unit is that the average distance from the planet to the Sun, just about a hundred and fifty million klick. At its nighest purpose, Saturn is nine AU, then at its most distant purpose, it's 10.1 AU. Saturn's average distance from the Sun is 9.6 AU.
hope it helps!
