[Pitch]

Now to add a little more detail to your main rock.

Select the layer with your main rock in it and hit (R). On the toolbar to the left, you will see the sharpen/blur tool highlighted. Right click on it and select Sharpen if it isn't already.

Set the strength to about 20% and use it to sharpen the detail. Don't go too crazy otherwise you will lose detail altogether.

Here is a before and after picture of the asteroid.

The 'before' looks blurred in comparision.