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Summary
DescriptionSTSci-2002-18.jpg
This is Globular Cluster M15 as imaged by the Hubble Space telescope in December 1998. This cluster lies 32,000 light years away in the constellation Pegasus. An intermediate-mass black hole lies at the core, with a mass about 4,000 times that of the Sun. Image Credit: NASA and The Hubble Heritage Team. (STSci/AURA)
The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain.
The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2]