This photo of the Hubble Space Telescope shows in detail a late galaxy, a small system of stars and gas that still seems to be in the process of development, while most of its congeners began to form billions of years ago. The evidence of his extreme youth is found in the explosion of newborn stars. Everything indicates that this galaxy, called POX 186, originated when two small lumps of gas and stars collided less than 100 million years ago causing the formation of new stars.
This Hubble image supports the theories of galactic formation from the assembly of small blocks composed of gas and stars. These blocks originated shortly after the Big Bang, the creative event of the Universe. However, it is a surprising finding due to its remarkable closeness in space since POX 186 is only 68 million light years away, towards Virgo. It belongs to the group of galaxies known as compact blue dwarfs due to its small size and its collection of hot blue stars. Its size of 900 light-years and about 10 million stars are insignificant. The Milky Way is about 100,000 light-years and houses 100,000 million stars.
This recent system is located in a region of very empty space, with its closest galactic neighbors to no less than 30 million light years. The gravitational encounter between the small clusters of which it formed, had to take longer than if it had happened in denser regions of space. However, the oldest stars that populate POX 186 are around one billion years old. It is believed that the least massive galaxies in the Universe have been the last to form.
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