At 5,500 light-years away, Messier 4 is the closest globular cluster to Earth. Globular clusters are spherical groups of stars, held together by gravity. This image spans the wide range of wavelengths that Hubble’s instruments are sensitive to: go.nasa.gov/4uChHZ2

Welcome to Hubble's Messier Marathon: 2026 Edition! We're sharing new Hubble images of cosmic objects from the Messier catalog, compiled by French astronomer Charles Messier in the 1700s. Come back tomorrow for another new image, and catch up here ⬇️ go.nasa.gov/4sS7XYW

@NASAHubble Spot the difference! 👏🏻👏🏻👏🏻