Three Infant Galaxies are Merging in the 'Cosmic Dawn'
Nov 22, 2013 20:09
NASA just published an incredible photo showing a "far-flung trio of primitive galaxies nestled inside an enormous blob of primordial gas nearly 13 billion light-years from Earth."
The amazing thing is that you're looking at something being created in the Cosmic Dawn, the period "when the universe was first bathed in starlight."
Richard Ellis of the California Institute of Technology, Pasadena, says:
This exceedingly rare triple system, seen when the universe was only 800 million years old [which is cosmic terms is the equivalent to the first 3.8 years of our lives], provides important insights into the earliest stages of galaxy formation during a period known as 'cosmic dawn,' when the universe was first bathed in starlight.
In 2009, astronomers could only see one ball of hot gas. But they're now able to see its true form by combining images from the Atacama Large Millimeter/submillimeter Array telescope in Chile and NASA's Hubble and Spitzer space telescopes.
NASA says that Himiko (a legendary queen of ancient Japan whose name was given to this space object) "it's possible the trio will eventually merge into a single galaxy similar to our own Milky Way."
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