Messier 75 or M75, also known as NGC 6864, is a giant globular cluster of stars in the southern constellation Sagittarius. It was discovered by Pierre Méchain in 1780 and included in Charles Messier’s catalog of comet-like objects that same year.
The space probe Pioneer 11 is moving in the direction of this constellation. It will not near the closest star in this constellation for over a million years at its present speed, by which time its batteries will be long dead.