Added second planet and placed it behind first planet.
step 4 of 7
To add perspective, I added a third smaller rocky planet.
step 5 of 7
Connected the third planet to the second planet by using the clone stamp.
step 6 of 7
Starting with a small soft brush, I added the water beginning with the smallest planet. Then, I added the big waterfall using a bigger, soft brush. I reduced the opacity of the white to indicate that the water fall is far away from earth.
step 7 of 7
Finally, I added the constellation. Note that the stars are smaller in the distance to create space dimension.