Complex sentence: The Celestial alphabet is an alphabet created by Heinrich Cornelius Agrippa, more commonly known as the Angelic Script, in the 16th Century, not to be confused with John Dee and Edward Kelley's Enochian alphabet, which is also sometimes called the Celestial alphabet.
Split into simpler sentences: The Celestial alphabet is an alphabet created by Heinrich Cornelius Agrippa, more commonly known as the Angelic Script, in the 16th Century. It is not to be confused with John Dee and Edward Kelley's Enochian alphabet, which is also sometimes called the Celestial alphabet.