Object Analysis

Messier 2 (M2) is a globular cluster in the constellation Aquarius, five degrees north of the star Beta Aquarii. It was discovered by Jean-Dominique Maraldi in 1746 and is one of the largest known globular clusters, containing approximately 150,000 stars. It is located about 37,000 light-years from Earth.

M2 is remarkably compressed and has an elliptical shape. At roughly 13 billion years old, it is one of the oldest clusters associated with the Milky Way. Its stars are predominantly ancient, metal-poor Population II stars. The cluster spans about 175 light-years in diameter, making it a behemoth even among its globular peers.

In a telescope, M2 appears as a bright, grainy ball of light with a very intense core. While it lacks the fame of M13, it is actually more luminous and more densely packed. It is best viewed in late summer and autumn, offering a spectacular example of the "fossil" structures that orbit the outskirts of our galaxy.