The celesta is a musical instrument that resembles a small piano but produces a unique, bell-like sound. It consists of metal plates struck by hammers, which are activated by a keyboard. The instrument is often used in orchestras and chamber music, adding a delicate and ethereal quality to compositions. Invented in the 19th century, the celesta gained popularity through its use in classical music, notably in works by composers like Pyotr Ilyich Tchaikovsky and Gustav Mahler. Its enchanting tone has also made it a favorite in film scores, enhancing the emotional impact of various scenes.