File:A Stellar Close Encounter at the Core of Globular Cluster M15 (1993-13-104).jpg
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A_Stellar_Close_Encounter_at_the_Core_of_Globular_Cluster_M15_(1993-13-104).jpg (350 × 435 pixels, file size: 19 KB, MIME type: image/jpeg)
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DescriptionA Stellar Close Encounter at the Core of Globular Cluster M15 (1993-13-104).jpg |
English: The sky is ablaze with several hundred thousand stars in the imaginary view from the surface of a hypothetical planet at the center if the globular star cluster called M15 (located 30,000 light- years away in the constellation Pegasus). The average distance between stars is a fraction of a light-year. A new population of extremely hot and blue stars - recently discovered by NASA's Hubble Space Telescope - stand out like diamonds on black velvet. At the center of the image, a bypassing star gravitationally pulls the outer envelop of gas from a red giant star. This process will expose the giant's core - the nuclear fusion "engine" that powers the star. This stellar cannibalism could only take place where stars are so crowded together, that chances for close encounters are exceptionally high. This new class of blue star is possibly fossil evidence that the center of the globular cluster has contracted to an extremely dense condition called "core collapse." This research, by DeMarchi and Dr. Francesco Paresce of the Space Telescope Science Institute and the European Space Agency, is being announced at a press conference at the meeting of the American Astronomical Society in Berkeley, California. |
Date | 9 June 1993 (upload date) |
Source | A Stellar Close Encounter at the Core of Globular Cluster M15 |
Author | Illustration by: G. Dana Berry, STSCI |
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Public domainPublic domainfalsefalse |
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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current | 20:58, 15 February 2024 | 350 × 435 (19 KB) | OptimusPrimeBot (talk | contribs) | #Spacemedia - Upload of https://stsci-opo.org/STScI-01EVVMYBNNQAM3NQYX9JNDGGB5.jpg via Commons:Spacemedia |
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