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White dwarfs in the globular cluster M4

White dwarfs in the globular cluster M4
Download this image: Hi-Res JPEG (1.1 MB)
The upper photograph shows the entire globular cluster, which contains several hundred thousand stars. The two lower photographs each show an enlargement of the extract marked. The weak light spots circled in blue are white dwarfs. They are between 12 and 13 billion years old and are probably some of the oldest stars in the Universe.

Credit: NASA/H.Richer/NOAO/AURA/NSF.