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Artist's Concept Illustrating Bulge & No Bulge Spiral Galaxies
 

 

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Summary

Description
English: This artist's concept illustrates the two types of spiral galaxies that populate our universe: those with plump middles, or central bulges (upper left), and those lacking the bulge (foreground). New observations from NASA's Spitzer Space Telescope provide strong evidence that the slender, bulge-less galaxies can, like their chubbier counterparts, harbour super-massive black holes at their cores. Previously, astronomers thought that a galaxy without a bulge could not have a super-massive black hole. In this illustration, jets shooting away from the black holes are depicted as thin streams. The findings are reshaping theories of galaxy formation, suggesting that a galaxy's "waistline" does not determine whether it will be home to a big black hole.
Date
Source NASA Image of the Day
Author NASA

Licensing

Public domain This file is in the public domain because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)

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Photo's description:
This artist's concept illustrates the two types of spiral galaxies that populate our universe: those with plump middles, or central bulges (upper left), and those lacking the bulge (foreground). New observations from NASA's Spitzer Space Telescope provide strong evidence that the slender, bulge-less galaxies can, like their chubbier counterparts, harbour super-massive black holes at their cores. Previously, astronomers thought that a galaxy without a bulge could not have a super-massive black hole. In this illustration, jets shooting away from the black holes are depicted as thin streams. The findings are reshaping theories of galaxy formation, suggesting that a galaxy's "waistline" does not determine whether it will be home to a big black hole.
Licensing:
Public Domain


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File name artist_s_concept_illustrating_bulge___no_bulge_spiral_galaxies.jpg
Size, Mbytes 0.24378125
Mime type image/jpeg




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