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Inside Globular Cluster M15

- Object NameObject NameA name or catalog number that astronomers use to identify an astronomical object.Credit: P. Guhathakurta (UCO/Lick Observatory, UC Santa Cruz), B. Yanny (Fermi National Accelerator Lab), D. Schneider (Pennsylvania State Univ.), J. Bahcall (Inst. for Advanced Study), and NASA.
- Release DateNovember 8, 1995
- Science ReleaseHubble Peers Deep into the Crowded Heart of the Densest Known Star Cluster
- CreditCredit: P. Guhathakurta (UCO/Lick Observatory, UC Santa Cruz), B. Yanny (Fermi National Accelerator Lab), D. Schneider (Pennsylvania State Univ.), J. Bahcall (Inst. for Advanced Study), and NASA.
Related Images & Videos

Globular Star Cluster M15 (right) and Its Center (left)
This mosaic of the globular cluster M15 (fifteenth object in the Messier catalog of star clusters and nebulae) contains over 30,000 stars. The Hubble Space Telescope probed the core of M15, the most tightly packed cluster of stars in our galaxy, to look for evidence of either a...
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Last Updated
Mar 28, 2025
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Claire Andreoli
NASA’s Goddard Space Flight Center
Greenbelt, Maryland
claire.andreoli@nasa.gov