Question

correct the text by inserting one comma. oh i didnt know that uranus has rings and is tipped on its side.

Explanation:

The interjection "Oh" at the start of the sentence needs a comma after it to separate it from the main independent clause, which is a standard grammatical rule for introductory interjections.

Answer:

Oh, I didn't know that Uranus has rings and is tipped on its side.