File:White Dwarf Stars in M4 (opo9532b).jpg

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Captions

Captions

A view of globular cluster M4 (fourth object in the Messier catalog of star clusters and nebulae).

Summary

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Description
English: A view of globular cluster M4 (fourth object in the Messier catalog of star clusters and nebulae). The nearest globular cluster to Earth (7, 000 light-years away), and containing more than 100, 000 stars, M4 was the target of a Hubble Space Telescope search for white dwarf stars.
Date 28 August 1995 (upload date)
Source White Dwarf Stars in M4
Author Kitt Peak National Observatory 0.9-meter telescope, National Optical Astronomy Observatories; courtesy M. Bolte (Universityof California, Santa Cruz)
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Licensing

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Public domain
This file is in the public domain because it was created by NASA and ESA. NASA Hubble material (and ESA Hubble material prior to 2009) is copyright-free and may be freely used as in the public domain without fee, on the condition that only NASA, STScI, and/or ESA is credited as the source of the material. This license does not apply if ESA material created after 2008 or source material from other organizations is in use.

The material was created for NASA by Space Telescope Science Institute under Contract NAS5-26555, or for ESA by the Hubble European Space Agency Information Centre. Copyright statement at hubblesite.org or 2008 copyright statement at spacetelescope.org.

For material created by the European Space Agency on the spacetelescope.org site since 2009, use the {{ESA-Hubble}} tag.

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