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"Hell volcanic diamond planet interior | Home | Is the sixth moon of the sixth planet laboratory of life? "05/06/2015 13.1 billion light years: a galaxy at the dawn of the universe
In that time, the universe was still young. It was certainly past the dark ages, those before the first stars only light, but galaxies were still in their infancy. EGS-zs8-1 somewhere in the direction of the constellation Bootes, and the light that reaches us today dates from the earliest interior times, when the universe was only 5% of that age today. 13.1 billion years were necessary for the light to travel the distance that separates us from this galaxy, whose discovery is the subject of a study just published in the journal Astrophysical Journal Letters.
What is exciting in such objects is that they offer us a trip to incredible distances, but in addition interior they make us travel in time, so far away that it is hard to imagine. EGS-zs8-1 was probably born a few hundred million years before the time when it emitted the light we see today from Earth, an age that human scale may seem canonical but to scale of the universe is not so important. Think indeed that our sun itself is aged about 4.6 billion years!
Here 13.1 billion years, so, EGS-zs8-1 had a mass of just over 15% of that has our Milky Way today. She was also much more active, forming stars very quickly, 80 times faster than it is today creates in our own galaxy. A real "star factory" early, so that tells us about those early times. "One of the most spectacular discoveries of the Hubble and Spitzer in recent years is the unexpected number of very bright galaxies in these ancient times, close to the time when the first galaxies formed," says Garth Illingworth of the University California / Santa Cruz, co-author of the study. "We still do not fully understand what they are and how they are related to the very many galaxies at the lowest brightness."
The authors of this discovery are as the farthest known galaxy to date. Difficult to decide on this specific issue, a handful of galaxies for "slice" of the 13 billion years that have been announced in 2012, 2013 and 2014 ... But in terms of EGS-zs8-1, which is certain is that the distance in question was confirmed, and that the galaxy was investigated by no less than two space telescopes (Hubble and Spitzer) and a terr observatory