Sunday, July 28, 2013

Hoag's Object: A Strange Ring Galaxy

Explanation: Is this one galaxy or two? This question came to light in 1950 when astronomer Art Hoag chanced upon this unusual extragalactic object. On the outside is a ring dominated by bright blue stars, while near the center lies a ball of much redder stars that are likely much older. Between the two is a gap that appears almost completely dark.

How Hoag's Object formed remains unknown, although similar objects have now been identified and collectively labeled as a form of ring galaxy.
See Explanation.  Clicking on the picture will download
 the highest resolution version available.
Genesis hypotheses include a galaxy collision billions of years ago and the gravitational effect of a central bar that has since vanished. The above photo taken by the Hubble Space Telescope in July 2001 revealed unprecedented details of Hoag's Object. More recent observations in radio waves indicate that Hoag's Object has not accreted a smaller galaxy in the past billion years. Hoag's Object spans about 100,000 light years and lies about 600 million light years away toward the constellation of the Snake (Serpens). Coincidentally, visible in the gap (at about one o'clock) is yet another ring galaxy

Image Credit: Credit: R. Lucas (STScI/AURA), Hubble Heritage Team, NASA

1 comment:

  1. The very space-time concept, on which theories of relativity are founded, has been mathematically, theoretically & experimentally proved as baseless and openly challenged on the basis of published scientific articles. Since the very space-time concept has been proved as baseless the question of curvature of space-time being correct does not arise. Gravity has been shown to be an electromagnetic force as foreseen by Maxwell due to the curl/vortices of aether (the electric dipoles) in the published article 'Revised Foundation of Theory of Everything: Non-living Things & Living Things' (; Sep 2010) Revised version of this article is available on vixra & World Science Database in my profile. Open challenge could seen at and .

    World should force all the physicists of the world to join to accept the standing open challenge (against the foundation of materialism at social, political & scientific level) and produce the rebuttal article to the scientific articles on the basis of which open challenge has been put forward; the very well known & only accepted procedure of denying the scientific findings published in peer-reviewed journals.

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