M5

M5 is a designation used in several different fields, referring to distinct entities that share the same alphanumeric label.

Messier 5, designated M5, is a bright globular cluster in the Milky Way, located in the constellation Serpens. It contains hundreds of thousands of stars and lies about 25,000 light-years away, with an estimated age around 12 to 13 billion years. It is one of the better-studied globular clusters and is visible with binoculars under dark skies.

The BMW M5 is the high-performance variant of BMW's 5 Series, produced by BMW M since 1985. It combines a tuned engine and sport-oriented chassis with luxury features, and several generations have emphasized speed, handling, and daily practicality. The M5 is widely regarded as a benchmark for high-performance sedans.

The M5 is also a major motorway in the United Kingdom, running from the M6 near Birmingham to Exeter in the southwest. It passes through the West Midlands, Gloucestershire, Bristol, and Somerset, linking with other motorways to support long-distance travel and freight movement.

M5Stack refers to a line of modular microcontroller development kits for Internet of Things projects. The platform includes compact modules such as M5StickC and M5Stack Core, often powered by ESP32 processors and featuring built-in displays, sensors, and extensible interfaces for rapid prototyping.