"Eclipse" is the tenth and final track from British progressive rock band Pink Floyd's 1973 album, The Dark Side of the Moon. It was sung by Roger Waters, with harmonies by David Gilmour. After Waters left, Gilmour sang the lead when performing live.

The song is often mistakenly labelled "Dark Side of the Moon" alongside "Brain Damage" because the two run together and are commonly played together on the radio, giving the impression that they are one song. The incorrect title is derived from a recurring lyric in "Brain Damage," and the title of the album.

ESP Eclipse is a guitar model distributed by ESP.

There are many different variations of the guitar, including the ESP Eclipse-II, the ESP Eclipse Custom, the ESP LTD EC-1000 and the ESP LTD EC-500. There are no major differences between these different models, only changes in binding, colours, materials (on the lower level LTD's) and inlays.

The guitar's shape is based on, and is almost exactly the same as, the Gibson Les Paul, set aside the headstock shape and some minor body contour changes. The guitar has a 24.75 inch scale length, and most models are made from the classic partnership of a mahogany set neck set into a solid mahogany body.

This guitar is used by many rock and metal players, such as James Hetfield, who currently has his own signature ESP Eclipse model - the ESP Truckster, which also comes in a cheaper LTD version.