What is wrong with the sentence " on a clear night when the moon is in the sky gaze up at it

To fix the sentence, it should be the following:

On a clear night, when the moon is in the sky, gaze up at it.

The changes I made were as follows:

on > On

night > night,

sky > sky,

it > it.

It was more adding the commas in where they needed to be and capitalizing the sentence as well as ending punctuation.