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SPACE-GALAXY-HUBBLE
This NASA/ESA Hubble Space Telescope image released on May 1, 2014 shows the heart of a vast cluster of galaxies called MACSJ1720+35. The galaxy cluster is so massive that its gravity distorts, brightens, and magnifies light from more distant objects behind it, an effect called gravitational lensing. In the top right an exploding star nicknamed Caracalla and located behind the cluster can just be made out. The supernova is a member of a special class of exploding star called Type Ia, prized by astronomers because it provides a consistent level of peak brightness that makes it reliable for making distance estimates. Finding a gravitationally lensed Type Ia supernova gives astronomers a unique opportunity to check the optical "prescription" of the foreground lensing cluster. AFP PHOTO/ESA/HUBBLE
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-, SPACE |
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AFP / Mediafax Foto |
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1 Mai 2014 |
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2500 x 1875 (845.7 KB) |
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