Saturday, November 17, 2012

New Most Distant


Astronomers working with the Hubble Space Telescope, and Spitzer Space Telescope have what they are calling the most distant galaxy ever discovered. This based on the redness of the object and not a full spectrum. The team studying it spent months eliminating other possible identities for the object. These possible identities including red stars, brown dwarfs, and galaxies that are red from age or dust but closer they finally came to the conclusion that a very distant galaxy was the correct explanation. The study involved 17 different filters ranging from near-ultraviolet to near-infrared and the galaxy only was seen in the two reddest filters. Its estimated distance is 13.3 billion light years away which would place it just 420 million years after the big bang is thought to have occurred which leaves vary little time to for galaxies to form, unless the Big Bang is wrong. Analysis indicates that the object is less than 600 Light Years across which is smaller than any galaxy ever observed but about the size of a globular cluster. Its estimated redshift is x =11.

Now one possibilities not mentioned in the description but suggested by the object's small size of is that this object is a globular cluster and not a galaxy. The size comparison is so obvious that it makes one wander why these it is not mentioned as one of the options eliminated. The most likely reason would be that proponents of the Big Bang expect to find small embolic galaxies and so that what it is seen as. Now to be fair if indeed this is a globular cluster it may be the largest and most distant globular cluster ever seen this fact could also have prevented them from considering it a globular cluster after all the largest known globular cluster is about 180 Light Years across. But is a 600 Light Years across globular cluster so far fetched after all it just 3.3 times the largest one near the milky way called NGC 5139. Further more if it were actually 4 billion Light Years with a large velocity relative to the Earth (0.9756c to 0.9938c depending on the angle) it would be only 180 Light Years across.

However even if this is truly a distant small galaxy it is definitely a rarity since few have been found out that far. If Galaxies are truly evenly distributed through space on a large scale then there should be many more galaxies out there than are observed particularly being able to spot one so small, even if it is by way of gravitational lensing. This fact alone is still a problem for the Big Bang.





------ Charles Creager Jr.

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